Dynamic Programming problems

	Problem Name	Online Judge	Year	Contest	Difficulty Level
1	ACM (ACronymMaker)	SPOJ			1
2	Alphacode	SPOJ			1
3	Assignments	SPOJ			1
4	Tower of Babylon	SPOJ			1
5	Philosophers Stone	SPOJ			1
6	Bytelandian gold coins	SPOJ			1
7	Summing to a Square Prime	SPOJ			1
8	Tiling a Grid With Dominoes	SPOJ			1
9	BLAST	SPOJ			1
10	Coins Game	SPOJ			1
11	Rectangles Perimeter	SPOJ			1
12	Party Schedule	SPOJ			1
13	Permutations	SPOJ			1
14	Piggy-Bank	SPOJ			1
15	Rent your airplane and make money	SPOJ			1
16	Roads	SPOJ			1
17	Candy	SPOJ			1
18	DNA Sequences	SPOJ			1
19	Feynman	SPOJ			1
20	Scuba diver	SPOJ			1
21	Help the soldier	SPOJ			1
22	Sums in a Triangle	SPOJ			1
23	Trip	SPOJ			1
24	Treats for the Cows	SPOJ			1
25	Two Ends	SPOJ			1
26	Is Bigger Smarter?	UVA			1
27	Unidirectional TSP	UVA			1
28	Vertex Cover	SPOJ			1
29	Aibohphobia	SPOJ			1
30	Black or White	SPOJ			1
31	Fool the Police	SPOJ			1
32	Palindrome 2000	SPOJ			1
33	Chop Ahoy! Revisited!	SPOJ			1
34	Seinfeld	SPOJ			1
35	Cross-country	SPOJ			1
36	In Danger	SPOJ			1
37	Distinct Subsequences	SPOJ			1
38	Edit distance	SPOJ			1
39	Fishmonger	SPOJ			1
40	Adjacent Bit Counts	SPOJ			1
41	The Double HeLiX	SPOJ			1
42	Pocket Money	SPOJ			1
43	LATGACH3	SPOJ			1
44	Mixtures	SPOJ			1
45	No Change	SPOJ			1
46	Square Brackets	SPOJ			1
47	Dollars	UVA			1
48	Let Me Count The Ways	UVA			1
49	Cutting Sticks	UVA			1
50	Dividing coins	UVA			1
51	Ingenuous Cubrency	UVA			1
52	Chocolate	SPOJ			1
53	Bee Walk	SPOJ			1
54	Sweet and Sour Rock	SPOJ			1
55	Activities	SPOJ			1
56	Martian Mining	SPOJ			1
57	Phidias	SPOJ			1
58	Sum of Digits	SPOJ			1
59	Pilots	SPOJ			1
60	Tri graphs	SPOJ			1
61	Cut Ribbon	Codeforces		Codeforces Round #119 (Div. 2)	1
62	Tetrahedron	Codeforces		Codeforces Round #113 (Div. 2)	1
63	A+B Problem	PKU			1
64	Exponentiation	PKU			1
65	Hangover	PKU			1
66	THE DRUNK JAILER	PKU			1
67	Homer Simpson	UVA			1
68	SuperSale	UVA			1
69	Luggage	UVA			1
70	Wedding shopping	UVA			1
71	Maximum Sum	UVA			1
72	How do you add?	UVA			1
73	Training for final	SPOJ			1
74	Easy Longest Increasing Subsequence	SPOJ			1
75	K-based Numbers	Timus			1
76	K-based Numbers. Version 2	Timus			1
77	Staircases	Timus			1
78	Binary Apple Tree	Timus			1
79	Lucky Tickets	Timus			1
80	Square Country	Timus			1
81	Binary Lexicographic Sequence	Timus			1
82	Metro	Timus			1
83	Maximum Sum	Timus			1
84	Scientific Conference	Timus			1
85	Flags	Timus			1
86	Milliard Vasya's Function	Timus			1
87	Collecting Beepers	UVA			1
88	Getting in Line	UVA			1
89	Army	Codeforces		School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules)	1
90	The Tower of Babylon	UVA			1
91	Magic Grid	SPOJ			1
92	Building Bridges	SPOJ			1
93	Largest Submatrix	UVA			1
94	Take the Land	UVA			1
95	Non-Decreasing Digits	SPOJ			1
96	Blueberries	SPOJ			1
97	DIE HARD	SPOJ			1
98	Save Thy Toys	SPOJ			1
99	0110SS	SPOJ			1
100	Tile Code	Live Archive	2007	Asia - Seoul	1
101	Tiling Up Blocks	Live Archive	2003	Asia - Kaohsiung	1
102	Candy	Live Archive	2008	Latin America - South America	1
103	Fibonacci Words	Live Archive	2012	World Finals - Warsaw	1
104	Hotels Along the Croatian Coast	SPOJ			1
105	Fibonacci Freeze	UVA			1
106	COSTLY CHESS	SPOJ			1
107	Soft Drinking	Codeforces		Codeforces Round #107 (Div. 2)	1
108	The 3n + 1 problem	UVA			1
109	Longest Common Subsequence	UVA			1
110	MAXIMUM WOOD CUTTER	SPOJ			1
111	Divisibility	UVA			1
112	Pearls	Live Archive	2002	Europe - Northwestern	1
113	Prime Permutations	CodeChef			1
114	Enormous Input Test	CodeChef			1
115	Boredom	Codeforces		Codeforces Round #260 (Div. 1) & Codeforces Round #260 (Div. 2)	1
116	Aliens at the train	SPOJ			1
117	T-primes	Codeforces		Codeforces Round #142 (Div. 2)	1
118	Ultra-Fast Mathematician	Codeforces		Codeforces Beta Round #57 (Div. 2)	1
119	Making Change	TJU			1
120	Before an Exam	Codeforces		Codeforces Beta Round #4 (Div. 2 Only)	1
121	The Bale Tower	TJU			1
122	Robot Instructions	UVA			1
123	Longest Palindrome	UVA			1
124	Optimal Array Multiplication Sequence	UVA			1
125	Longest Run on a Snowboard	UVA			1
126	Coin Change	UVA			1
127	Divisible Group Sums	UVA			1
128	Strategic Defense Initiative	UVA			1
129	Vacation	UVA			1
130	Testing the CATCHER	UVA			1
131	History Grading	UVA			1
132	Stacking Boxes	UVA			1
133	The Twin Towers	UVA			1
134	Compromise	UVA			1
135	23 out of 5	UVA			1
136	Grandpa's Walk	Live Archive	2012	Asia - Jakarta	1
137	Generations of Tribbles	Live Archive	2013	North America - Pacific Northwest	1
138	Equal Sum Sets	Live Archive	2013	Asia - Aizu	1
139	Cheap Travel	Codeforces		Codeforces Round #266 (Div. 2)	1
140	k-Tree	Codeforces		Codeforces Round #247 (Div. 2)	1
141	Flowers	Codeforces		Codeforces Round #271 (Div. 2)	1
142	To the Max	PKU			1
143	Membership Management	Live Archive	2010	Asia - Tokyo	1
144	The Great Ball	SPOJ			1
145	XOR Maximization	SPOJ			1
146	Given Length and Sum of Digits...	Codeforces		Codeforces Round #277.5 (Div. 2)	1
147	The Knapsack Problem	SPOJ			1
148	Wachovia Bank	SPOJ			1
149	Trip Planning	Live Archive	2008	Asia - Taipei	1
150	Forming Quiz Teams	UVA			1
151	Woodcutters	Codeforces		Codeforces Round #303 (Div. 2)	1
152	Number of Ways	Codeforces		Codeforces Round #266 (Div. 2)	1
153	Histogram	SPOJ			1
154	Two Substrings	Codeforces		Codeforces Round #306 (Div. 2)	1
155	Quasi Binary	Codeforces		Codeforces Round #300	1
156	Dreamoon and WiFi	Codeforces		Codeforces Round #272 (Div. 2)	1
157	Fence	Codeforces		Codeforces Round #211 (Div. 2)	1
158	Bridging signals	Live Archive	2003	Europe - Northwestern	1
159	ABC Path	SPOJ			1
160	ShorterSuperSum	TopCoder		SRM 467 - Div2 easy] (14151)	1
161	Omar	A2 Online Judge			1
162	Chat room	Codeforces		Codeforces Beta Round #54 (Div. 2)	1
163	Perfection	UVA			1
164	Joysticks	Codeforces		Codeforces Round #345 (Div. 2)	1
165	Kefa and First Steps	Codeforces		Codeforces Round #321 (Div. 2)	1
166	Divisibility by Eight	Codeforces		Codeforces Round #306 (Div. 2)	1
167	BerSU Ball	Codeforces		Codeforces Round #277.5 (Div. 2)	1
168	Kuriyama Mirai's Stones	Codeforces		Codeforces Round #248 (Div. 2)	1
169	Mashmokh and ACM	Codeforces		Codeforces Round #240 (Div. 1) & Codeforces Round #240 (Div. 2)	1
170	Sereja and Suffixes	Codeforces		Codeforces Round #215 (Div. 2)	1
171	Puzzles	Codeforces		Codeforces Round #196 (Div. 2)	1
172	Flipping Game	Codeforces		Codeforces Round #191 (Div. 2)	1
173	Ilya and Queries	Codeforces		Codeforces Round #186 (Div. 2)	1
174	Binary Search Tree	Live Archive	2010	Asia - Daejeon	1
175	Drazil and Factorial	Codeforces		Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1)	1
176	Cleaning Robot	SPOJ			1
177	Can you answer these queries I	SPOJ			1
178	Twin Primes	UVA			1
179	Alphacode	Live Archive	2004	North America - East Central NA	1
180	Positive or Negative	A2 Online Judge			1
181	Prime Digital Roots	Live Archive	2001	South Pacific	1
182	Sums in a Triangle	CodeChef			1
183	The jackpot	UVA			1
184	New Year and Hurry	Codeforces		Good Bye 2016	1
185	Cormen --- The Best Friend Of a Man	Codeforces		Codeforces Round #377 (Div. 2)	1
186	Jill Rides Again	UVA			1
187	Watermelon	Codeforces		Codeforces Beta Round #4 (Div. 2 Only)	1
188	QAQ	Codeforces		Codeforces Round #447 (Div. 2)	1
189	Simple Math	A2 Online Judge			1
190	Anton and Danik	Codeforces		Codeforces Round #379 (Div. 2)	1
191	DZY Loves Chessboard	Codeforces		Codeforces Round #254 (Div. 2)	1
192	Princess Farida	SPOJ			1
193	Longest Common Substring	SPOJ			1
194	Buying Apples!	SPOJ			1
195	Trees	Live Archive	2004	South Pacific	1
196	Tiling a Grid With Dominoes	Live Archive	2007	North America - Greater NY	1
197	Bicoloring	UVA			1
198	I Can Guess the Data Structure!	UVA			1
199	Prime Path	Live Archive	2006	Europe - Northwestern	1
200	Party	Codeforces		Codeforces Beta Round #87 (Div. 1 Only) & Codeforces Beta Round #87 (Div. 2 Only)	1
201	Exploring Pyramids	Live Archive	2005	Europe - Northeastern	1
202	Largest Rectangle in a Histogram	SPOJ			1
203	Mice and Maze	Live Archive	2001	Europe - Southwestern	1
204	Petya and Strings	Codeforces		Codeforces Beta Round #85 (Div. 2 Only)	1
205	What Goes Up	UVA			1
206	Permutation Arrays	UVA			1
207	I-Keyboard	SPOJ			2
208	Card Sorting	SPOJ			2
209	Point Connection Game in a Circle	SPOJ			2
210	Decoding Morse Sequences	SPOJ			2
211	Counting The Way of Bracket Replacement	SPOJ			2
212	String problem	SPOJ			2
213	Partition	SPOJ			2
214	Particular Palindromes	SPOJ			2
215	Balancing the Stone	SPOJ			2
216	String Shuffle	SPOJ			2
217	Street	SPOJ			2
218	Three-coloring of binary trees	SPOJ			2
219	Up Subsequence	SPOJ			2
220	Dab of Backpack	SPOJ			2
221	Dice	SPOJ			2
222	JEDNAKOST	SPOJ			2
223	Feline Olympics - Mouseball	SPOJ			2
224	Catch Fish	SPOJ			2
225	Tourist	SPOJ			2
226	Con-Junctions	SPOJ			2
227	Yoda Goes Palindromic !	SPOJ			2
228	Esferas	SPOJ			2
229	Temptation Island	SPOJ			2
230	Interesting number	SPOJ			2
231	Sorting is not easy	SPOJ			2
232	Musketeers	SPOJ			2
233	The Courier	SPOJ			2
234	Deliver pizza	SPOJ			2
235	Counting K-Rectangle	SPOJ			2
236	Making A Budget	SPOJ			2
237	Menu	SPOJ			2
238	Nested Dolls	SPOJ			2
239	NERED	SPOJ			2
240	Another Tree Problem	SPOJ			2
241	Another Box Problem	SPOJ			2
242	Tiling	UVA			2
243	Distinct Subsequences	UVA			2
244	Queue	UVA			2
245	Jugs	UVA			2
246	Game Show Math	UVA			2
247	Another Problem on Strings	Codeforces		Codeforces Round #112 (Div. 2)	2
248	Password	Codeforces		Codeforces Beta Round #93 (Div. 1 Only) & Codeforces Beta Round #93 (Div. 2 Only)	2
249	Caesar's Legions	Codeforces		Codeforces Beta Round #89 (Div. 2)	2
250	Bar Codes	UVA			2
251	Chest of Drawers	UVA			2
252	Marks Distribution	UVA			2
253	Flight Planner	UVA			2
254	Ministry	Timus			2
255	Railway Tickets	Timus			2
256	Anniversary Party	Timus			2
257	Segments	Timus			2
258	False Mirrors	Timus			2
259	Bicolored Horses	Timus			2
260	Brackets Sequence	Timus			2
261	Nudnik Photographer	Timus			2
262	Threeprime Numbers	Timus			2
263	BATMAN1	SPOJ			2
264	BATMAN2	SPOJ			2
265	Leaves	SPOJ			2
266	Problem 3	SPOJ			2
267	Chop Ahoy! Revisited!	Live Archive	2005	Africa/Middle East - Arab and North Africa	2
268	Mosaic	Live Archive	2009	North America - Southeast USA	2
269	BATMAN3	SPOJ			2
270	Drop the Triples	Live Archive	2007	Latin America - South America	2
271	Always on the run	UVA			2
272	Bit Mask	UVA			2
273	Space Elevator	PKU			2
274	Mobile Service	SPOJ			2
275	Optimal Binary Search Tree	UVA			2
276	Ice Sculptures	Codeforces		VK Cup 2012 Qualification Round 1	2
277	Little Elephant and Painting	CodeChef			2
278	Chopsticks	UVA			2
279	Beautiful People	SGU			2
280	Erdos Numbers	Live Archive	2000	Europe - Northwestern & Europe - Southwestern & Europe - Mid-Central	2
281	Weights and Measures	UVA			2
282	Handball	UVA			2
283	String to Palindrome	UVA			2
284	Black-White Grid	Live Archive	2006	Asia - Hanoi	2
285	George and Job	Codeforces		Codeforces Round #267 (Div. 2)	2
286	Cow Frisbee Team	TJU			2
287	String Partition	UVA			2
288	Tower of Cubes	UVA			2
289	Pebble Solitaire	UVA			2
290	String Computer	UVA			2
291	Make Palindrome	UVA			2
292	String Distance and Transform Process	UVA			2
293	Again Palindrome	UVA			2
294	Slurpys	UVA			2
295	The Marriage Interview :-)	UVA			2
296	Simple Minded Hashing	UVA			2
297	Murcia's Skyline	UVA			2
298	Diving for Gold	UVA			2
299	Trouble of 13-Dots	UVA			2
300	Longest Match	UVA			2
301	Sum of Different Primes	UVA			2
302	Walking on the Safe Side	UVA			2
303	Pebbles	Live Archive	2007	North America - Pacific Northwest & North America - Southern California	2
304	Game of Sum	UVA			2
305	Fibonacci System	Live Archive	2008	Europe - Northeastern	2
306	Painting the balls	SGU			2
307	Destruction Cannon	URI			2
308	Travelling Salesman	UVA			2
309	Rain	SPOJ			2
310	Fibo	A2 Online Judge			2
311	Boxes	UVA			2
312	Counting binary strings	SPOJ			2
313	Motoboy	URI			2
314	Color the Fence	Codeforces		Codeforces Round #202 (Div. 2)	2
315	KTV	UVA			2
316	Tight Words	UVA			2
317	Square	UVA			2
318	Soldier and Number Game	Codeforces		Codeforces Round #304 (Div. 2)	2
319	1807	SPOJ			2
320	Geometric Progression	Codeforces		Codeforces Round #Pi (Div. 2)	2
321	Land Acquisition	SPOJ			2
322	Restoring Password	Codeforces		Codeforces Beta Round #76 (Div. 2 Only)	2
323	New Year and Domino	Codeforces		Good Bye 2015	2
324	Chain Reaction	Codeforces		Codeforces Round #336 (Div. 1) & Codeforces Round #336 (Div. 2)	2
325	Alternative Thinking	Codeforces		Codeforces Round #334 (Div. 1) & Codeforces Round #334 (Div. 2)	2
326	Approximating a Constant Range	Codeforces		Codeforces Round #333 (Div. 2)	2
327	Modulo Sum	Codeforces		Codeforces Round #319 (Div. 2)	2
328	Kyoya and Colored Balls	Codeforces		Codeforces Round #309 (Div. 1) & Codeforces Round #309 (Div. 2)	2
329	Covered Path	Codeforces		Codeforces Round #298 (Div. 2)	2
330	Photo to Remember	Codeforces		VK Cup 2015 - Qualification Round 1	2
331	Reposts	Codeforces		VK Cup 2015 - Qualification Round 1	2
332	Mr. Kitayuta's Colorful Graph	Codeforces		Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2)	2
333	DZY Loves Sequences	Codeforces		Codeforces Round #255 (Div. 1) & Codeforces Round #255 (Div. 2)	2
334	Inna and Choose Options	Codeforces		Codeforces Round #234 (Div. 2)	2
335	Polo the Penguin and Matrix	Codeforces		Codeforces Round #177 (Div. 2)	2
336	Mr. Kitayuta's Gift	Codeforces		Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2)	2
337	Dancing Cows	SPOJ			2
338	Vasya and String	Codeforces		Codeforces Round #354 (Div. 2)	2
339	Bing it	Live Archive	2009	Asia - Harbin	2
340	Wooden Sticks	SPOJ			2
341	Sequence	Live Archive	2014	Asia - Kuala Lumpur	2
342	Concert Tour	Live Archive	2014	Asia - Bangkok	2
343	Shopping	Live Archive	2014	Asia - Tokyo	2
344	Maximum sum on a torus	UVA			2
345	Maximum Sub-sequence Product	UVA			2
346	Another Longest Increasing Subsequence Problem	SPOJ			2
347	Hard problem	Codeforces		Codeforces Round #367 (Div. 2)	2
348	Triangular N-Queens Problem	Live Archive	2006	North America - Greater NY	2
349	Pay the Price	UVA			2
350	Making Change	UVA			2
351	Functions again	Codeforces		Codeforces Round #407 (Div. 1) & Codeforces Round #407 (Div. 2)	2
352	Tennis Championship	Codeforces		Codeforces Round #382 (Div. 2) & Codeforces Round #382 (Div. 1)	2
353	Timofey and a tree	Codeforces		Codeforces Round #395 (Div. 1) & Codeforces Round #395 (Div. 2)	2
354	Pride	Codeforces		Codeforces Round #446 (Div. 1) & Codeforces Round #446 (Div. 2)	2
355	Game of Credit Cards	Codeforces		Codeforces Round #401 (Div. 2)	2
356	Journey	Codeforces		Codeforces Round #428 (Div. 2)	2
357	A DP Problem	Live Archive	2003	Asia - Tehran	2
358	Polo the Penguin and Strings	Codeforces		Codeforces Round #177 (Div. 1) & Codeforces Round #177 (Div. 2)	2
359	Ra-One Numbers	SPOJ			2
360	G-One Numbers	SPOJ			2
361	LUCIFER Number	SPOJ			2
362	Squares	UVA			2
363	Ferry Loading	UVA			2
364	Unnatural Conditions	Codeforces		AIM Tech Round 5 (rated, Div. 1 + Div. 2)	2
365	Sinking Ship	Codeforces		Codeforces Beta Round #59 (Div. 2)	2
366	Quadratic Equation	SPOJ			2
367	Candy (Again)	SPOJ			3
368	Slikar	SPOJ			3
369	Palindromic Subsequence	UVA			3
370	String reduction	SPOJ			3
371	Paid Roads	SPOJ			3
372	Common Subsequences	SPOJ			3
373	Even Palindrome	SPOJ			3
374	The Secret of an Aerolite	SPOJ			3
375	Hackers' Crackdown	UVA			3
376	Minus Operation	SPOJ			3
377	Partition the sequence	SPOJ			3
378	Traveling by Stagecoach	SPOJ			3
379	Maximum Triangle Area	SPOJ			3
380	Polygon	SPOJ			3
381	Help Bob	SPOJ			3
382	Many polygons	SPOJ			3
383	Fast Food	UVA			3
384	Budget Travel	UVA			3
385	Free Candies	UVA			3
386	Physics Practical	Codeforces		Codeforces Round #154 (Div. 2)	3
387	To Add or Not to Add	Codeforces		Codeforces Round #143 (Div. 2)	3
388	Barcode	Codeforces		Codeforces Round #139 (Div. 2)	3
389	Choosing Capital for Treeland	Codeforces		Codeforces Round #135 (Div. 2)	3
390	Little Elephant and Interval	Codeforces		Codeforces Round #129 (Div. 1) & Codeforces Round #129 (Div. 2)	3
391	Distance in Tree	Codeforces		VK Cup 2012 Round 1	3
392	Longest Regular Bracket Sequence	Codeforces		Codeforces Beta Round #5	3
393	Mysterious Present	Codeforces		Codeforces Beta Round #4 (Div. 2 Only)	3
394	The least round way	Codeforces		Codeforces Beta Round #2	3
395	ZigZag	TopCoder		TCCC '03 Semifinals 3 - Div1 easy] (4493)	3
396	BadNeighbors	TopCoder		TCCC '04 Round 4 - Div1 easy] (5009)	3
397	Hierarchy	Timus			3
398	Gentlemen	Timus			3
399	Minimal Coverage	Timus			3
400	Intervals of Monotonicity	Timus			3
401	Sense of Beauty	Timus			3
402	Mnemonics and Palindromes	Timus			3
403	Raucous Rockers	UVA			3
404	COUNT PAREN	SPOJ			3
405	How Many O's?	UVA			3
406	Bribe the Prisoners	SPOJ			3
407	I-Keyboard	Live Archive	2000	Europe - Central	3
408	Orchard Trees	UVA			3
409	Determine it	UVA			3
410	Car with powers	SPOJ			3
411	Make Psycho	SPOJ			3
412	Most Servings Meal	SPOJ			3
413	Term Strategy	UVA			3
414	Best Coalitions	UVA			3
415	RGBStreet	TopCoder		SRM 325 - Div2 medium] (10005)	3
416	Cards, bags and coins	CodeChef			3
417	Sereja and Game	CodeChef			3
418	Little Elephant and Movies	CodeChef			3
419	Zeta-Nim Game	CodeChef			3
420	The Matrix Game	CodeChef			3
421	Pleasing Chief	CodeChef			3
422	Maximum Absurdity	Codeforces		Codeforces Round #193 (Div. 2)	3
423	Building Bridges(HARD)	SPOJ			3
424	Gargari and Permutations	Codeforces		Codeforces Round #264 (Div. 2)	3
425	Fetching Cooking Tools	CodeChef			3
426	Color Stripe	Codeforces		Codeforces Round #135 (Div. 2)	3
427	Crime Wave - The Sequel	UVA			3
428	Many Paths, One Destination	UVA			3
429	Scheduling Lectures	UVA			3
430	AGTC	UVA			3
431	Hippity Hopscotch	UVA			3
432	Little Red Riding Hood	UVA			3
433	Walking Around Wisely	UVA			3
434	Probablistic OR	SPOJ			3
435	End up with More Teams	UVA			3
436	Fewest Flops	UVA			3
437	IOI07 Miners	SPOJ			3
438	Beautiful Numbers	UVA			3
439	Mr. Kitayuta, the Treasure Hunter	Codeforces		Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1)	3
440	Dynamic LCA	SPOJ			3
441	Sum of Digits	Timus			3
442	Tour	UVA			3
443	Count Paths	A2 Online Judge			3
444	Plug-in	Codeforces		Yandex.Algorithm Open 2011 Qualification 1	3
445	Internet Address	Codeforces		CROC-MBTU 2012, Elimination Round (ACM-ICPC)	3
446	Petya and Java	Codeforces		Codeforces Beta Round #61 (Div. 2)	3
447	Lazy Math Instructor	Live Archive	2000	Asia - Tehran	3
448	Simple Strings	Codeforces		Educational Codeforces Round 12	3
449	Hard Process	Codeforces		Educational Codeforces Round 11	3
450	Bear and Compressing	Codeforces		IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2)	3
451	New Skateboard	Codeforces		Educational Codeforces Round 8	3
452	Cards	Codeforces		8VC Venture Cup 2016 - Elimination Round	3
453	Longtail Hedgehog	Codeforces		Codeforces Round #338 (Div. 2)	3
454	Zuma	Codeforces		Codeforces Round #336 (Div. 1) & Codeforces Round #336 (Div. 2)	3
455	Kefa and Dishes	Codeforces		Codeforces Round #321 (Div. 2)	3
456	Bear and Blocks	Codeforces		Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2)	3
457	Vanya and Scales	Codeforces		Codeforces Round #308 (Div. 2)	3
458	Mike and Feet	Codeforces		Codeforces Round #305 (Div. 1) & Codeforces Round #305 (Div. 2)	3
459	Writing Code	Codeforces		Codeforces Round #302 (Div. 1) & Codeforces Round #302 (Div. 2)	3
460	A and B and Interesting Substrings	Codeforces		Codeforces Round #294 (Div. 2)	3
461	Ilya and Escalator	Codeforces		Codeforces Round #293 (Div. 2)	3
462	Painting Fence	Codeforces		Codeforces Round #256 (Div. 2)	3
463	Working out	Codeforces		Codeforces Round #245 (Div. 1) & Codeforces Round #245 (Div. 2)	3
464	Booking System	Codeforces		Codeforces Round #241 (Div. 2)	3
465	Art Union	Codeforces		Codeforces Round #241 (Div. 2)	3
466	Long Path	Codeforces		Codeforces Round #239 (Div. 1) & Codeforces Round #239 (Div. 2)	3
467	Bear and Prime Numbers	Codeforces		Codeforces Round #226 (Div. 2)	3
468	Permutation	Codeforces		Codeforces Round #209 (Div. 2)	3
469	Bubble Sort Graph	Codeforces		Codeforces Round #198 (Div. 2) & Codeforces Round #198 (Div. 1)	3
470	Xenia and Weights	Codeforces		Codeforces Round #197 (Div. 2)	3
471	Greg and Graph	Codeforces		Codeforces Round #179 (Div. 1) & Codeforces Round #179 (Div. 2)	3
472	Ladder	Codeforces		Codeforces Round #171 (Div. 2)	3
473	Little Girl and Maximum XOR	Codeforces		Codeforces Round #169 (Div. 2)	3
474	Greenhouse Effect	Codeforces		Codeforces Round #165 (Div. 1) & Codeforces Round #165 (Div. 2)	3
475	Good Sequences	Codeforces		Codeforces Round #162 (Div. 1) & Codeforces Round #162 (Div. 2)	3
476	Omar Loves Candies	A2 Online Judge			3
477	Robbers' watch	Codeforces		Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2)	3
478	Recycling Bottles	Codeforces		Codeforces Round #352 (Div. 1) & Codeforces Round #352 (Div. 2)	3
479	Alyona and the Tree	Codeforces		Codeforces Round #358 (Div. 2)	3
480	Greedy Hydra	SPOJ			3
481	Coloring Trees	Codeforces		Codeforces Round #369 (Div. 2)	3
482	Triangles	Live Archive	2014	South Pacific	3
483	Ada and Game	SPOJ			3
484	An impassioned circulation of affection	Codeforces		Codeforces Round #418 (Div. 2)	3
485	The Debut Album	Timus			3
486	String Popping	UVA			3
487	FOODIE	SPOJ			3
488	Shopping Trip	UVA			3
489	Arpa's weak amphitheater and Mehrdad's valuable Hoses	Codeforces		Codeforces Round #383 (Div. 1) & Codeforces Round #383 (Div. 2)	3
490	Hopeless Coach	TJU			3
491	Alyona and Spreadsheet	Codeforces		Codeforces Round #401 (Div. 2)	3
492	Sagheer, the Hausmeister	Codeforces		Codeforces Round #417 (Div. 2)	3
493	Mike and gcd problem	Codeforces		Codeforces Round #410 (Div. 2)	3
494	Mahmoud and a Message	Codeforces		Codeforces Round #396 (Div. 2)	3
495	Journey	Codeforces		Codeforces Round #374 (Div. 2)	3
496	Re-Arrange II	SPOJ			3
497	Combo Deal	UVA			3
498	ACM (ACronym Maker)	Live Archive	2005	North America - East Central NA	3
499	Save the problem!	Codeforces		MemSQL Start[c]UP 3.0 - Round 2 (onsite finalists)	3
500	The Vindictive Coach	UVA			3
501	Boy Scouts	SPOJ			4
502	Antimonotonicity	UVA			4
503	Let go to the movies	SPOJ			4
504	Who is The Boss	SPOJ			4
505	Drop the Triples	SPOJ			4
506	Najkraci	SPOJ			4
507	Convex Polygons	SPOJ			4
508	Trees Again	SPOJ			4
509	Batman	UVA			4
510	Almost Arithmetical Progression	Codeforces		Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1)	4
511	Chilly Willy	Codeforces		Codeforces Round #152 (Div. 2)	4
512	Queries for Number of Palindromes	Codeforces		CROC-MBTU 2012, Elimination Round (ACM-ICPC)	4
513	Weather	Codeforces		Codeforces Round #145 (Div. 2, ACM-ICPC Rules)	4
514	Hometask	Codeforces		Codeforces Round #131 (Div. 2)	4
515	Palindrome pairs	Codeforces		VK Cup 2012 Qualification Round 2	4
516	Message	Codeforces		Codeforces Round #110 (Div. 1) & Codeforces Round #110 (Div. 2)	4
517	Hometask	Codeforces		Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2)	4
518	Bag of mice	Codeforces		Codeforces Round #105 (Div. 2)	4
519	Buns	Codeforces		Codeforces Beta Round #82 (Div. 2)	4
520	Enemy is weak	Codeforces		Codeforces Beta Round #57 (Div. 2)	4
521	Eternal Victory	Codeforces		Codeforces Beta Round #57 (Div. 2)	4
522	Fatawy	SPOJ			4
523	Malevich Strikes Back!	Timus			4
524	Folding	Timus			4
525	Mars Canals	Timus			4
526	Bottle Taps	Timus			4
527	Classmates 2	Timus			4
528	Crack	Timus			4
529	SMS	Timus			4
530	Gasoline Station	Timus			4
531	One-two, One-two 2	Timus			4
532	Lemon Tale	Timus			4
533	Communication Fiend	Timus			4
534	Chocolate	SPOJ			4
535	ICPC Team Strategy	UVA			4
536	Zeros and Ones	UVA			4
537	BATMAN4	SPOJ			4
538	Bit by Bit	SPOJ			4
539	The Bridges of Kolsberg	UVA			4
540	Busy Programmer	UVA			4
541	Chocolate Box	UVA			4
542	Digit Sum	UVA			4
543	Dominoes	SPOJ			4
544	Tiling Dominoes	UVA			4
545	INVITATION FOR TECHOFES	SPOJ			4
546	Expect the Expected	UVA			4
547	Dumb Bones	UVA			4
548	Minion Circle	CodeChef			4
549	Lov-e Pap Pap-e Polti	SPOJ			4
550	Little Elephant and Blocks	CodeChef			4
551	Pashmak and Graph	Codeforces		Codeforces Round #261 (Div. 2)	4
552	Magic, Wizardry and Wonders	Codeforces		Codeforces Round #143 (Div. 2)	4
553	Another Assignment Problem	SPOJ			4
554	Little Pony and Harmony Chest	Codeforces		Codeforces Round #259 (Div. 1) & Codeforces Round #259 (Div. 2)	4
555	Matchsticks	TJU			4
556	Antimatter Ray Clearcutting	UVA			4
557	Bright Bracelet	Live Archive	2003	North America - Mid-Central USA	4
558	Fortune Telling	Codeforces		Codeforces Beta Round #55 (Div. 2)	4
559	Balanced Numbers	SPOJ			4
560	Avoiding Jungle in the Dark	UVA			4
561	Account Book	UVA			4
562	Matches	UVA			4
563	Fox And Jumping	Codeforces		Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1)	4
564	A Lot of Games	Codeforces		Codeforces Round #260 (Div. 1) & Codeforces Round #260 (Div. 2)	4
565	Red-Green Towers	Codeforces		Codeforces Round #273 (Div. 2)	4
566	Number of Paths in the Empire	SGU			4
567	Civilization	Codeforces		Codeforces Round #260 (Div. 1) & Codeforces Round #260 (Div. 2)	4
568	Fools and Roads	Codeforces		Codeforces Round #121 (Div. 1) & Codeforces Round #121 (Div. 2)	4
569	DIVSEQ	SPOJ			4
570	Dima and Salad	Codeforces		Codeforces Round #214 (Div. 2)	4
571	Image Preview	Codeforces		Codeforces Round #345 (Div. 1) & Codeforces Round #345 (Div. 2)	4
572	Babaei and Birthday Cake	Codeforces		Codeforces Round #343 (Div. 2)	4
573	XOR Equation	Codeforces		8VC Venture Cup 2016 - Final Round	4
574	Once Again...	Codeforces		Codeforces Round #323 (Div. 1) & Codeforces Round #323 (Div. 2)	4
575	Gerald and Giant Chess	Codeforces		Codeforces Round #313 (Div. 1) & Codeforces Round #313 (Div. 2)	4
576	Arthur and Table	Codeforces		Codeforces Round #311 (Div. 2)	4
577	Bad Luck Island	Codeforces		Codeforces Round #301 (Div. 2)	4
578	Clique Problem	Codeforces		Codeforces Round #296 (Div. 2) & Codeforces Round #296 (Div. 1)	4
579	A and B and Lecture Rooms	Codeforces		Codeforces Round #294 (Div. 2)	4
580	Riding in a Lift	Codeforces		Codeforces Round #274 (Div. 2) & Codeforces Round #274 (Div. 1)	4
581	Appleman and Tree	Codeforces		Codeforces Round #263 (Div. 1) & Codeforces Round #263 (Div. 2)	4
582	Prefixes and Suffixes	Codeforces		Codeforces Round #246 (Div. 2)	4
583	Maximum Submatrix 2	Codeforces		Codeforces Round #221 (Div. 1) & Codeforces Round #221 (Div. 2)	4
584	Jeff and Rounding	Codeforces		Codeforces Round #204 (Div. 1) & Codeforces Round #204 (Div. 2)	4
585	Book of Evil	Codeforces		Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1)	4
586	Shaass and Bookshelf	Codeforces		Codeforces Round #178 (Div. 2)	4
587	Cow Program	Codeforces		Codeforces Round #174 (Div. 1) & Codeforces Round #174 (Div. 2)	4
588	Zero Tree	Codeforces		Codeforces Round #168 (Div. 1) & Codeforces Round #168 (Div. 2)	4
589	Letter	Codeforces		Codeforces Round #116 (Div. 2, ACM-ICPC Rules)	4
590	Round Table Knights	Codeforces		Codeforces Beta Round #65 (Div. 2)	4
591	Reberland Linguistics	Codeforces		Codeforces Round #349 (Div. 1) & Codeforces Round #349 (Div. 2)	4
592	The Child and Zoo	Codeforces		Codeforces Round #250 (Div. 2) & Codeforces Round #250 (Div. 1)	4
593	The Values You Can Make	Codeforces		Codeforces Round #360 (Div. 1) & Codeforces Round #360 (Div. 2)	4
594	Ingredients	SPOJ			4
595	Generate a String	Codeforces		Educational Codeforces Round 16	4
596	Forming Teams	Codeforces		Codeforces Round #133 (Div. 2)	4
597	Can U Win?	UVA			4
598	Bridge Building	UVA			4
599	Cái túi ( Hard version )	SPOJ Vietnam			4
600	Drazil and Tiles	Codeforces		Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1)	4
601	Going Postal	Live Archive	2014	South Pacific	4
602	Namit In Trouble	SPOJ			4
603	New Year and Fireworks	Codeforces		Good Bye 2016	4
604	Pie Rules	Codeforces		MemSQL Start[c]UP 3.0 - Round 1	4
605	Fire	Codeforces		Codeforces Round #436 (Div. 2)	4
606	Rent your airplane and make money	Live Archive	2003	Europe - Southwestern	4
607	Vladik and Memorable Trip	Codeforces		Codeforces Round #416 (Div. 2)	4
608	Connecting Universities	Codeforces		Codeforces Round #364 (Div. 1) & Codeforces Round #364 (Div. 2)	4
609	Office Keys	Codeforces		Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals)	4
610	The Intriguing Obsession	Codeforces		Codeforces Round #439 (Div. 2)	4
611	Chloe and pleasant prizes	Codeforces		Codeforces Round #384 (Div. 2)	4
612	Divide and conquer	CodeChef			4
613	Fire Again	Codeforces		Codeforces Beta Round #35 (Div. 2)	4
614	Binary Search	Live Archive	2000	Europe - Northeastern	4
615	Expression Again	UVA			4
616	XOR-pyramid	Codeforces		Codeforces Round #483 (Div. 1) [Thanks, Botan Investments and Victor Shaburov!] & Codeforces Round #483 (Div. 2) [Thanks, Botan Investments and Victor Shaburov!]	4
617	Party	A2 Online Judge			4
618	Python Indentation	Codeforces		Codeforces Round #455 (Div. 2)	4
619	Cookies	Codeforces		Codeforces Beta Round #64	4
620	Philip J. Fry Problem	UVA			4
621	Free Parentheses	UVA			4
622	Assignments	Live Archive	2010	Asia - Harbin	4
623	DNA Laboratory	SPOJ			5
624	Allergy Test	UVA			5
625	Coin Changing Again	UVA			5
626	Huffman´s Greed	SPOJ			5
627	Connect Line Segments	SPOJ			5
628	Optimal Cut	UVA			5
629	Independent Attacking Zones	UVA			5
630	Clear Symmetry	Codeforces		Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2)	5
631	Dynasty Puzzles	Codeforces		Codeforces Round #121 (Div. 1) & Codeforces Round #121 (Div. 2)	5
632	Compatible Numbers	Codeforces		Codeforces Round #112 (Div. 2)	5
633	Substring and Subsequence	Codeforces		VK Cup 2012 Round 2	5
634	Porcelain	Codeforces		Codeforces Round #105 (Div. 2)	5
635	Logo Turtle	Codeforces		Codeforces Beta Round #96 (Div. 1) & Codeforces Beta Round #96 (Div. 2)	5
636	Games with Rectangle	Codeforces		Codeforces Beta Round #94 (Div. 1 Only) & Codeforces Beta Round #94 (Div. 2 Only)	5
637	Spiders	Codeforces		School Regional Team Contest, Saratov, 2011	5
638	Petr#	Codeforces		Codeforces Beta Round #86 (Div. 1 Only) & Codeforces Beta Round #86 (Div. 2 Only)	5
639	Basketball Team	Codeforces		Codeforces Beta Round #83 (Div. 1 Only) & Codeforces Beta Round #83 (Div. 2 Only)	5
640	Number With The Given Amount Of Divisors	Codeforces		Codeforces Beta Round #27 (Codeforces format, Div. 2)	5
641	Bargaining Table	Codeforces		Codeforces Beta Round #22 (Div. 2 Only)	5
642	Checkout Assistant	Codeforces		Codeforces Beta Round #19	5
643	Sequence	Codeforces		Codeforces Beta Round #13	5
644	A Simple Task	Codeforces		Codeforces Beta Round #11	5
645	How many trees?	Codeforces		Codeforces Beta Round #9 (Div. 2 Only)	5
646	K-based Numbers. Version 3	Timus			5
647	Ship Routes	Timus			5
648	Train	Timus			5
649	Enterprise	Timus			5
650	Cargo Agency	Timus			5
651	Roadworks	Timus			5
652	Happiness to People!	Timus			5
653	E-mail	Timus			5
654	Anniversary Firework	Timus			5
655	Atomic Car Race	UVA			5
656	IPL - CRICKET TOURNAMENT	SPOJ			5
657	The Islands	UVA			5
658	Candy	UVA			5
659	Fibonacci Words	UVA			5
660	CreatureTraining	TopCoder		TCO08 Round 2 - Div1 medium] (12012)	5
661	Lucky Common Subsequence	Codeforces		Codeforces Round #201 (Div. 1) & Codeforces Round #201 (Div. 2)	5
662	Kalila and Dimna in the Logging Industry	Codeforces		Codeforces Round #189 (Div. 1) & Codeforces Round #189 (Div. 2)	5
663	JUMPING DORA	SPOJ			5
664	GO FOR DIAMONDS	SPOJ			5
665	Subsequence Problem	SPOJ			5
666	Weak Links	UVA			5
667	Sereja and Bubble Sort	CodeChef			5
668	Count Digits	CodeChef			5
669	Paint the Tree	CodeChef			5
670	Increase Sequence	Codeforces		Codeforces Round #266 (Div. 2)	5
671	WordMath	TopCoder		Unknown ()	5
672	Summing Slopes	CodeChef			5
673	Patches	URI			5
674	Promotion	URI			5
675	Hotel	Live Archive	2005	Asia - Tehran	5
676	Antimatter	Codeforces		Codeforces Round #225 (Div. 1)	5
677	Two Paths	Codeforces		Codeforces Beta Round #14 (Div. 2)	5
678	Robot Rapping Results Report	Codeforces		CROC 2016 - Elimination Round	5
679	Running with Obstacles	Codeforces		VK Cup 2016 - Qualification Round 1	5
680	Spy Syndrome 2	Codeforces		Manthan, Codefest 16	5
681	Famil Door and Brackets	Codeforces		Codeforces Round #343 (Div. 2)	5
682	Wet Shark and Blocks	Codeforces		Codeforces Round #341 (Div. 2)	5
683	Running Track	Codeforces		Codeforces Round #338 (Div. 2)	5
684	Chocolate Bar	Codeforces		Educational Codeforces Round 1	5
685	Restaurant	Codeforces		Testing Round #12	5
686	Super M	Codeforces		Codeforces Round #328 (Div. 2)	5
687	Minimization	Codeforces		Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) & Codeforces Round #317 [AimFund Thanks-Round] (Div. 2)	5
688	Symmetric and Transitive	Codeforces		Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2)	5
689	Clique in the Divisibility Graph	Codeforces		VK Cup 2015 - Finals, online mirror	5
690	Correcting Mistakes	Codeforces		VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only)	5
691	Inversions problem	Codeforces		Rockethon 2015	5
692	Sums of Digits	Codeforces		Codeforces Round #289 (Div. 2, ACM ICPC Rules)	5
693	Breaking Good	Codeforces		Codeforces Round #287 (Div. 2)	5
694	Obsessive String	Codeforces		Codeforces Round #282 (Div. 1) & Codeforces Round #282 (Div. 2)	5
695	Strip	Codeforces		Codeforces Round #278 (Div. 1) & Codeforces Round #278 (Div. 2)	5
696	Valid Sets	Codeforces		Codeforces Round #277 (Div. 2)	5
697	Pillars	Codeforces		Codeforces Round #271 (Div. 2)	5
698	Elimination	Codeforces		RCC 2014 Warmup (Div. 2)	5
699	Upgrading Array	Codeforces		Codeforces Round #236 (Div. 2) & Codeforces Round #236 (Div. 1)	5
700	Roman and Numbers	Codeforces		Codeforces Round #235 (Div. 2)	5
701	Inna and Dima	Codeforces		Codeforces Round #220 (Div. 2)	5
702	Counting Rectangles is Fun	Codeforces		Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2)	5
703	Levko and Array	Codeforces		Codeforces Round #210 (Div. 1) & Codeforces Round #210 (Div. 2)	5
704	Dima and Hares	Codeforces		Codeforces Round #208 (Div. 2)	5
705	Vasya and Beautiful Arrays	Codeforces		Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2)	5
706	Jeff and Furik	Codeforces		Codeforces Round #204 (Div. 1) & Codeforces Round #204 (Div. 2)	5
707	The Great Julya Calendar	Codeforces		ABBYY Cup 3.0 - Finals (online version)	5
708	Ciel and Duel	Codeforces		Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2)	5
709	Connected Components	Codeforces		Croc Champ 2013 - Round 1	5
710	Choosing Balls	Codeforces		Codeforces Round #162 (Div. 1) & Codeforces Round #162 (Div. 2)	5
711	Lucky Tree	Codeforces		Codeforces Beta Round #84 (Div. 1 Only) & Codeforces Beta Round #84 (Div. 2 Only)	5
712	Iahub and Permutations	Codeforces		Codeforces Round #198 (Div. 2) & Codeforces Round #198 (Div. 1)	5
713	The Unreal Tournament	UVA			5
714	Bear and Tower of Cubes	Codeforces		Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2)	5
715	Alyona and Strings	Codeforces		Codeforces Round #358 (Div. 2)	5
716	Sum	Codeforces		Codeforces Beta Round #46 (Div. 2)	5
717	Longest Increasing Sequence	UVA			5
718	Mario Kart	A2 Online Judge			5
719	Berzerk	Codeforces		Codeforces Round #406 (Div. 1) & Codeforces Round #406 (Div. 2)	5
720	The Bakery	Codeforces		Codeforces Round #426 (Div. 1) & Codeforces Round #426 (Div. 2)	5
721	An overnight dance in discotheque	Codeforces		Codeforces Round #418 (Div. 2)	5
722	Hanoi Factory	Codeforces		Codeforces Round #401 (Div. 2)	5
723	Square Subsets	Codeforces		Codeforces Round #448 (Div. 2)	5
724	Winter is here	Codeforces		Codeforces Round #428 (Div. 2)	5
725	Covering Sets	CodeChef			5
726	HexagonalBattlefield	TopCoder		SRM 449 - Div1 medium] (13903)	5
727	Testing the CATCHER	Live Archive	1994	World Finals - Phoenix	5
728	Paint templates	SPOJ			6
729	The Top-Code	SPOJ			6
730	Game --- Mouse and Cheese	UVA			6
731	Bracket Sequence	SPOJ			6
732	Incrementing The Integer	SPOJ			6
733	Mystic Craft	SPOJ			6
734	Little Elephant and Elections	Codeforces		Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2)	6
735	Let's Play Osu!	Codeforces		Codeforces Round #146 (Div. 1) & Codeforces Round #146 (Div. 2)	6
736	Fence	Codeforces		Codeforces Round #145 (Div. 2, ACM-ICPC Rules) & Codeforces Round #145 (Div. 1, ACM-ICPC Rules)	6
737	Table	Codeforces		Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2)	6
738	Towers	Codeforces		Codeforces Round #142 (Div. 1)	6
739	Decoding Genome	Codeforces		Codeforces Round #137 (Div. 2)	6
740	Relay Race	Codeforces		Codeforces Round #131 (Div. 1) & Codeforces Round #131 (Div. 2)	6
741	Numbers	Codeforces		Codeforces Round #131 (Div. 1) & Codeforces Round #131 (Div. 2)	6
742	Police Station	Codeforces		Codeforces Round #130 (Div. 2)	6
743	Solitaire	Codeforces		Codeforces Round #130 (Div. 2)	6
744	AlgoRace	Codeforces		Codeforces Round #119 (Div. 1) & Codeforces Round #119 (Div. 2)	6
745	File List	Codeforces		VK Cup 2012 Round 3 (Unofficial Div. 2 Edition)	6
746	Wizards and Huge Prize	Codeforces		Codeforces Round #114 (Div. 1) & Codeforces Round #114 (Div. 2)	6
747	Phone Talks	Codeforces		VK Cup 2012 Qualification Round 1	6
748	Cipher	Codeforces		Codeforces Round #110 (Div. 1) & Codeforces Round #110 (Div. 2)	6
749	Coloring Brackets	Codeforces		Codeforces Round #106 (Div. 2)	6
750	Lucky Subsequence	Codeforces		Codeforces Round #104 (Div. 1) & Codeforces Round #104 (Div. 2)	6
751	Palindromes	Codeforces		Codeforces Beta Round #98 (Div. 2)	6
752	Buses	Codeforces		Codeforces Beta Round #79 (Div. 1 Only) & Codeforces Beta Round #79 (Div. 2 Only)	6
753	Interesting Game	Codeforces		Codeforces Beta Round #73 (Div. 1 Only) & Codeforces Beta Round #73 (Div. 2 Only)	6
754	Two out of Three	Codeforces		Yandex.Algorithm 2011 Qualification 2	6
755	Beaver	Codeforces		Codeforces Beta Round #71	6
756	Beaver Game	Codeforces		Codeforces Beta Round #70 (Div. 2)	6
757	Train	Codeforces		Codeforces Beta Round #68	6
758	Partial Teacher	Codeforces		Manthan 2011	6
759	Beautiful numbers	Codeforces		Codeforces Beta Round #51	6
760	Anfisa the Monkey	Codeforces		School Team Contest #2 (Winter Computer School 2010/11)	6
761	Let's Go Rolling!	Codeforces		School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules)	6
762	Animals	Codeforces		Codeforces Beta Round #35 (Div. 2)	6
763	Wonderful Randomized Sum	Codeforces		Codeforces Beta Round #33 (Codeforces format)	6
764	Shooting Gallery	Codeforces		Codeforces Beta Round #30 (Codeforces format)	6
765	Stripe 2	Codeforces		Codeforces Alpha Round #21 (Codeforces format)	6
766	Fish	Codeforces		Codeforces Beta Round #16 (Div. 2 Only)	6
767	LCIS	Codeforces		Codeforces Beta Round #10	6
768	Cinema Cashier	Codeforces		Codeforces Beta Round #10	6
769	Looking for Order	Codeforces		Codeforces Beta Round #8	6
770	Lizards and Basements 2	Codeforces		Codeforces Beta Round #6 (Div. 2 Only)	6
771	ACM Diagnostics	Timus			6
772	Martian Army	Timus			6
773	Eating High	Timus			6
774	Decimation	Timus			6
775	Salary for Robots	Timus			6
776	Alternative Solution	Timus			6
777	Brainwashing Device	Timus			6
778	Plants vs. Zombies HD SP	UVA			6
779	Eleven	UVA			6
780	Ciel and Gondolas	Codeforces		Codeforces Round #190 (Div. 1)	6
781	MagicNaming	TopCoder		SRM 526.5 - Div2 hard] (14762)	6
782	Sort that Queue	Live Archive	2005	Africa/Middle East - Arab and North Africa	6
783	Oil Skimming	A2 Online Judge			6
784	Common Palindrome	UVA			6
785	Summing Slopes	SPOJ			6
786	Maximum Sub-sequence Product	Live Archive	1996	Europe - Southeastern	6
787	The Maths Lecture	Codeforces		Codeforces Round #287 (Div. 2)	6
788	Longest Common Subsequence	SPOJ			6
789	Snakes	A2 Online Judge			6
790	Table Compression	Codeforces		Codeforces Round #345 (Div. 1) & Codeforces Round #345 (Div. 2)	6
791	Magic Numbers	Codeforces		Educational Codeforces Round 8	6
792	Group Projects	Codeforces		8VC Venture Cup 2016 - Elimination Round	6
793	Array GCD	Codeforces		AIM Tech Round (Div. 1) & AIM Tech Round (Div. 2)	6
794	Hamiltonian Spanning Tree	Codeforces		Wunder Fund Round 2016 (Div. 1 + Div. 2 combined)	6
795	Subsequences	Codeforces		Testing Round #12	6
796	Duff in Beach	Codeforces		Codeforces Round #326 (Div. 1) & Codeforces Round #326 (Div. 2)	6
797	Pig and Palindromes	Codeforces		Codeforces Round #316 (Div. 2)	6
798	Vanya and Brackets	Codeforces		Codeforces Round #308 (Div. 2)	6
799	Road Improvement	Codeforces		Codeforces Round #302 (Div. 1)	6
800	Demiurges Play Again	Codeforces		Codeforces Round #300	6
801	Work Group	Codeforces		VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only)	6
802	Anya and Cubes	Codeforces		Codeforces Round #297 (Div. 2)	6
803	???? ?? ?????? - 2 (round version)	Codeforces		VK Cup 2015 - Round 1	6
804	Pluses everywhere	Codeforces		Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1)	6
805	Arthur and Brackets	Codeforces		Codeforces Round #288 (Div. 2)	6
806	New Year Domino	Codeforces		Good Bye 2014	6
807	Special Matrices	Codeforces		Codeforces Round #277.5 (Div. 2)	6
808	LIS of Sequence	Codeforces		Codeforces Round #277 (Div. 2)	6
809	Kindergarten	Codeforces		Codeforces Round #276 (Div. 1)	6
810	Dreamoon and Strings	Codeforces		Codeforces Round #272 (Div. 2) & Codeforces Round #272 (Div. 1)	6
811	Fedor and Essay	Codeforces		Codeforces Round #267 (Div. 2)	6
812	Substitutes in Number	Codeforces		Codeforces Round #265 (Div. 1) & Codeforces Round #265 (Div. 2)	6
813	Jzzhu and Numbers	Codeforces		Codeforces Round #257 (Div. 1)	6
814	Random Task	Codeforces		Codeforces Round #247 (Div. 2)	6
815	Match & Catch	Codeforces		Codeforces Round #244 (Div. 2)	6
816	Cunning Gena	Codeforces		RCC 2014 Warmup (Div. 2) & RCC 2014 Warmup (Div. 1)	6
817	Minesweeper 1D	Codeforces		Codeforces Round #237 (Div. 2)	6
818	New Year Letter	Codeforces		Good Bye 2013	6
819	Watching Fireworks is Fun	Codeforces		Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2)	6
820	Insertion Sort	Codeforces		Codeforces Round #212 (Div. 2)	6
821	Palindrome	Codeforces		MemSQL start[c]up Round 2 - online version	6
822	EKG	Codeforces		ABBYY Cup 3.0	6
823	Sereja and Subsequences	Codeforces		Codeforces Round #187 (Div. 1) & Codeforces Round #187 (Div. 2)	6
824	Ilya and Roads	Codeforces		Codeforces Round #186 (Div. 2)	6
825	Greg and Friends	Codeforces		Codeforces Round #179 (Div. 1) & Codeforces Round #179 (Div. 2)	6
826	Permutation Sum	Codeforces		Codeforces Round #175 (Div. 2)	6
827	Yet Another Number Game	Codeforces		Codeforces Round #173 (Div. 2)	6
828	Maxim and Restaurant	Codeforces		Codeforces Round #160 (Div. 1) & Codeforces Round #160 (Div. 2)	6
829	Little Elephant and LCM	Codeforces		Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2)	6
830	Two Strings	Codeforces		Codeforces Round #138 (Div. 1) & Codeforces Round #138 (Div. 2)	6
831	Trains and Statistic	Codeforces		Codeforces Round #353 (Div. 2)	6
832	Least Common Multiple	Live Archive	2014	South Pacific	6
833	Segment Tree	SPOJ			6
834	Leha and another game about graph	Codeforces		Codeforces Round #429 (Div. 1) & Codeforces Round #429 (Div. 2)	6
835	Sonya and Problem Wihtout a Legend	Codeforces		Codeforces Round #371 (Div. 1) & Codeforces Round #371 (Div. 2)	6
836	Karen and Supermarket	Codeforces		Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2)	6
837	Unusual Sequences	Codeforces		Codeforces Round #450 (Div. 2)	6
838	Okabe and El Psy Kongroo	Codeforces		Codeforces Round #420 (Div. 2)	6
839	Memory and Scores	Codeforces		Codeforces Round #370 (Div. 2)	6
840	Mahmoud and a xor trip	Codeforces		Codeforces Round #396 (Div. 2)	6
841	Vladik and cards	Codeforces		Codeforces Round #384 (Div. 2)	6
842	Dynamic Problem Scoring	Codeforces		VK Cup 2017 - Round 3	6
843	Array Queries	Codeforces		Educational Codeforces Round 19	6
844	Demogorgon	URI			6
845	Save the Python Programmers!	Live Archive	2010	North America - Pacific Northwest	6
846	Money for Nothing	Live Archive	2017	World Finals - Rapid City	6
847	Jill Rides Again	Live Archive	1997	World Finals - San Jose	6
848	Colored Tiles	UVA			7
849	Catch Sheep	SPOJ			7
850	Two Longest Paths	UVA			7
851	Table Tennis	UVA			7
852	Number Transformation	Codeforces		Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2)	7
853	Blood Cousins Return	Codeforces		Codeforces Round #151 (Div. 2)	7
854	World Eater Brothers	Codeforces		Codeforces Round #148 (Div. 1) & Codeforces Round #148 (Div. 2)	7
855	Cactus	Codeforces		Codeforces Round #143 (Div. 2)	7
856	Fragile Bridges	Codeforces		Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2)	7
857	Wooden Fence	Codeforces		Codeforces Round #117 (Div. 2)	7
858	Cubes	Codeforces		Codeforces Round #116 (Div. 2, ACM-ICPC Rules)	7
859	Word Cut	Codeforces		Croc Champ 2012 - Round 2	7
860	Spiral Maximum	Codeforces		Croc Champ 2012 - Round 1	7
861	Education Reform	Codeforces		Codeforces Beta Round #90	7
862	Petya and Spiders	Codeforces		Codeforces Beta Round #85 (Div. 1 Only) & Codeforces Beta Round #85 (Div. 2 Only)	7
863	Lucky Country	Codeforces		Codeforces Beta Round #77 (Div. 1 Only)	7
864	Lucky Numbers	Codeforces		Codeforces Beta Round #77 (Div. 1 Only)	7
865	Beavermuncher-0xFF	Codeforces		Codeforces Beta Round #69 (Div. 1 Only) & Codeforces Beta Round #69 (Div. 2 Only)	7
866	Big Maximum Sum	Codeforces		Codeforces Beta Round #67 (Div. 2)	7
867	LionAge II	Codeforces		Codeforces Beta Round #66	7
868	Dot	Codeforces		Codeforces Beta Round #63 (Div. 2)	7
869	Optical Experiment	Codeforces		Manthan 2011	7
870	Changing a String	Codeforces		Codeforces Beta Round #52 (Div. 2)	7
871	First Digit Law	Codeforces		Codeforces Beta Round #50	7
872	Right Triangles	Codeforces		Codeforces Testing Round #1	7
873	Comb	Codeforces		School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules)	7
874	Phone Number	Codeforces		School Team Contest #2 (Winter Computer School 2010/11)	7
875	Pawn	Codeforces		Codeforces Beta Round #40 (Div. 2)	7
876	TV Game	Codeforces		Codeforces Beta Round #31 (Div. 2, Codeforces format)	7
877	Seller Bob	Codeforces		Codeforces Beta Round #18 (Div. 2 Only)	7
878	Camels	Codeforces		Codeforces Beta Round #14 (Div. 2)	7
879	Lost in Space	Timus			7
880	Archer's Travel	Timus			7
881	Lunar Code	Timus			7
882	Martian Plates	Timus			7
883	Brainfuck	Timus			7
884	Join	Timus			7
885	Yet Another Answer	Timus			7
886	TheProgrammingContestDivOne	TopCoder		SRM 502 - Div1 medium] (14431)	7
887	Cats Transport	Codeforces		Codeforces Round #185 (Div. 1) & Codeforces Round #185 (Div. 2)	7
888	Playing War	UVA			7
889	Merry-go-round	Timus			7
890	Yet Another Assignment Problem	SPOJ			7
891	Component Testing	Live Archive	2012	North America - Mid-Atlantic USA & North America - Southern California & North America - Southeast USA	7
892	Genetic Engineering	Codeforces		Rockethon 2014	7
893	Duckindromes	UVA			7
894	Binary Table	Codeforces		CROC 2016 - Final Round [Private, For Onsite Finalists Only]	7
895	Fence Divercity	Codeforces		Codeforces Round #346 (Div. 2)	7
896	Zip-line	Codeforces		Codeforces Round #345 (Div. 1)	7
897	Intellectual Inquiry	Codeforces		CROC 2016 - Elimination Round	7
898	Little Artem and Random Variable	Codeforces		VK Cup 2016 - Round 2	7
899	Thief in a Shop	Codeforces		Educational Codeforces Round 9	7
900	Product Sum	Codeforces		Codeforces Round #344 (Div. 2)	7
901	Famil Door and Roads	Codeforces		Codeforces Round #343 (Div. 2)	7
902	Kleofáš and the n-thlon	Codeforces		Codeforces Round #333 (Div. 1) & Codeforces Round #333 (Div. 2)	7
903	Top Secret Task	Codeforces		Codeforces Round #327 (Div. 1)	7
904	Bulbo	Codeforces		Bubble Cup 8 - Finals [Online Mirror]	7
905	Ann and Half-Palindrome	Codeforces		Codeforces Round #311 (Div. 2)	7
906	Remembering Strings	Codeforces		Codeforces Round #302 (Div. 1) & Codeforces Round #302 (Div. 2)	7
907	Quest	Codeforces		VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only)	7
908	Transmitting Levels	Codeforces		ZeptoLab Code Rush 2015	7
909	Darth Vader and Tree	Codeforces		Codeforces Round #291 (Div. 2)	7
910	Traffic Jams in the Land	Codeforces		Codeforces Round #284 (Div. 1)	7
911	Name That Tune	Codeforces		Codeforces Round #284 (Div. 1) & Codeforces Round #284 (Div. 2)	7
912	Treeland Tour	Codeforces		Codeforces Round #279 (Div. 2)	7
913	Hiking	Codeforces		Codeforces Round #277.5 (Div. 2)	7
914	Devu and Birthday Celebration	Codeforces		Codeforces Round #251 (Div. 2)	7
915	Special Grid	Codeforces		Codeforces Round #249 (Div. 2)	7
916	Guess the Tree	Codeforces		Codeforces Round #245 (Div. 1) & Codeforces Round #245 (Div. 2)	7
917	Sereja and Two Sequences	Codeforces		Codeforces Round #243 (Div. 1) & Codeforces Round #243 (Div. 2)	7
918	President's Path	Codeforces		Codeforces Round #241 (Div. 2)	7
919	Beautiful Pairs of Numbers	Codeforces		Codeforces Round #236 (Div. 1)	7
920	Painting The Wall	Codeforces		Codeforces Round #233 (Div. 1) & Codeforces Round #233 (Div. 2)	7
921	Captains Mode	Codeforces		Codeforces Round #222 (Div. 1) & Codeforces Round #222 (Div. 2)	7
922	Inna and Sequence	Codeforces		Codeforces Round #220 (Div. 2)	7
923	Valera and Fools	Codeforces		Codeforces Round #216 (Div. 2)	7
924	Free Market	Codeforces		Codeforces Round #213 (Div. 1) & Codeforces Round #213 (Div. 2)	7
925	Levko and Strings	Codeforces		Codeforces Round #210 (Div. 1) & Codeforces Round #210 (Div. 2)	7
926	Lucky Number Representation	Codeforces		Codeforces Round #206 (Div. 1)	7
927	Axis Walking	Codeforces		Codeforces Round #191 (Div. 2)	7
928	Game with Powers	Codeforces		Codeforces Round #188 (Div. 1)	7
929	Yaroslav and Two Strings	Codeforces		Codeforces Round #179 (Div. 2)	7
930	Coin Troubles	Codeforces		Codeforces Round #174 (Div. 1) & Codeforces Round #174 (Div. 2)	7
931	Maxim and Matrix	Codeforces		Codeforces Round #160 (Div. 1) & Codeforces Round #160 (Div. 2)	7
932	Plus and xor	Codeforces		All-Ukrainian School Olympiad in Informatics	7
933	Game	Codeforces		Codeforces Beta Round #46 (Div. 2)	7
934	Black and White Tree	Codeforces		Codeforces Round #158 (Div. 2)	7
935	Nanami's Digital Board	Codeforces		Codeforces Round #248 (Div. 2) & Codeforces Round #248 (Div. 1)	7
936	Divisor Tree	Codeforces		Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1)	7
937	Identify the Number	A2 Online Judge			7
938	FibonacciKnapsack	TopCoder		SRM 352 - Div1 medium] (10709)	7
939	Longest Run on a Snowboard	Live Archive	2006	Asia - Coimbatore	7
940	Rent your airplane and make money	UVA			7
941	Hongcow Buys a Deck of Cards	Codeforces		Codeforces Round #385 (Div. 1) & Codeforces Round #385 (Div. 2)	7
942	On the Bench	Codeforces		Codeforces Round #429 (Div. 1) & Codeforces Round #429 (Div. 2)	7
943	Ant Man	Codeforces		Codeforces Round #366 (Div. 1) & Codeforces Round #366 (Div. 2)	7
944	Vladik and chat	Codeforces		Codeforces Round #390 (Div. 2)	7
945	Maximum Questions	Codeforces		Codeforces Round #450 (Div. 2)	7
946	Ralph and Mushrooms	Codeforces		Codeforces Round #447 (Div. 2)	7
947	Fafa and Ancient Mathematics	Codeforces		Codeforces Round #465 (Div. 2)	7
948	Pictures with Kittens (hard version)	Codeforces		Codeforces Round #521 (Div. 3)	7
949	Segment Sum	Codeforces		Educational Codeforces Round 53 (Rated for Div. 2)	7
950	Lannister Army	SPOJ			7
951	Sweets Problem	CodeChef			7
952	Little Elephant and Broken Sorting	Codeforces		Codeforces Round #157 (Div. 1)	8
953	Lucky Arrays	Codeforces		Codeforces Round #156 (Div. 1)	8
954	Number Challenge	Codeforces		Codeforces Round #146 (Div. 1)	8
955	Gifts	Codeforces		Codeforces Round #142 (Div. 1)	8
956	Fractal Detector	Codeforces		Codeforces Round #141 (Div. 2)	8
957	Periodical Numbers	Codeforces		Codeforces Round #132 (Div. 2)	8
958	IT Restaurants	Codeforces		VK Cup 2012 Finals (unofficial online-version)	8
959	Multicolored Marbles	Codeforces		VK Cup 2012 Finals, Practice Session	8
960	Name	Codeforces		Codeforces Round #116 (Div. 2, ACM-ICPC Rules)	8
961	Polycarpus the Safecracker	Codeforces		VK Cup 2012 Round 1	8
962	Help Caretaker	Codeforces		Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2)	8
963	Clearing Up	Codeforces		Codeforces Round #101 (Div. 2)	8
964	New Year Garland	Codeforces		Codeforces Round #100	8
965	Constants in the language of Shakespeare	Codeforces		Codeforces Beta Round #96 (Div. 1)	8
966	Fibonacci Sums	Codeforces		Codeforces Beta Round #93 (Div. 1 Only)	8
967	Brackets	Codeforces		Codeforces Beta Round #92 (Div. 1 Only) & Codeforces Beta Round #92 (Div. 2 Only)	8
968	Linear Kingdom Races	Codeforces		Codeforces Beta Round #87 (Div. 1 Only)	8
969	Castle	Codeforces		Codeforces Beta Round #79 (Div. 1 Only)	8
970	Widget Library	Codeforces		Codeforces Beta Round #74 (Div. 1 Only) & Codeforces Beta Round #74 (Div. 2 Only)	8
971	Beautiful Road	Codeforces		Codeforces Beta Round #73 (Div. 1 Only)	8
972	Genetic engineering	Codeforces		Yandex.Algorithm 2011 Round 2	8
973	Numbers	Codeforces		Codeforces Beta Round #72 (Div. 1 Only)	8
974	Password	Codeforces		Codeforces Beta Round #71	8
975	Tourist	Codeforces		All-Ukrainian School Olympiad in Informatics	8
976	Fibonacci army	Codeforces		Unknown Language Round #2	8
977	Petya and Post	Codeforces		Codeforces Beta Round #61 (Div. 2)	8
978	Sweets Game	Codeforces		Codeforces Beta Round #59 (Div. 2)	8
979	Dead Ends	Codeforces		Codeforces Beta Round #49 (Div. 2)	8
980	Bombing	Codeforces		Codeforces Beta Round #47	8
981	Common ancestor	Codeforces		Codeforces Beta Round #46 (Div. 2)	8
982	What Has Dirichlet Got to Do with That?	Codeforces		School Team Contest #1 (Winter Computer School 2010/11)	8
983	Don't fear, DravDe is kind	Codeforces		Codeforces Beta Round #28 (Codeforces format)	8
984	Bath Queue	Codeforces		Codeforces Beta Round #28 (Codeforces format)	8
985	Broken robot	Codeforces		Codeforces Beta Round #24	8
986	Tree	Codeforces		Codeforces Beta Round #23	8
987	Flag 2	Codeforces		Codeforces Beta Round #18 (Div. 2 Only)	8
988	Balance	Codeforces		Codeforces Beta Round #17	8
989	Beads	Codeforces		Codeforces Beta Round #8	8
990	Defining Macros	Codeforces		Codeforces Beta Round #7	8
991	Yekaterinburg Subway	Timus			8
992	Somali Pirates	Timus			8
993	Frequent Flyer Card	Timus			8
994	Inventory	UVA			8
995	One-Based Arithmetic	Codeforces		Testing Round #10	8
996	2048	Codeforces		Coder-Strike 2014 - Round 2	8
997	Scheme	Codeforces		Codeforces Beta Round #22 (Div. 2 Only)	8
998	e-Government	Codeforces		VK Cup 2012 Round 2	8
999	The Chocolate Spree	Codeforces		Manthan, Codefest 16	8
1000	Preorder Test	Codeforces		8VC Venture Cup 2016 - Final Round	8
1001	Wilbur and Trees	Codeforces		Codeforces Round #331 (Div. 2)	8
1002	Zublicanes and Mumocrates	Codeforces		Codeforces Round #322 (Div. 2)	8
1003	LCS Again	Codeforces		Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round]	8
1004	Flights for Regular Customers	Codeforces		Codeforces Round #319 (Div. 1)	8
1005	Mausoleum	Codeforces		Codeforces Round #Pi (Div. 2)	8
1006	Drazil and Morning Exercise	Codeforces		Codeforces Round #292 (Div. 1)	8
1007	Inversions problem	Codeforces		Rockethon 2015	8
1008	Progress Monitoring	Codeforces		Codeforces Round #289 (Div. 2, ACM ICPC Rules)	8
1009	Birthday	Codeforces		Codeforces Round #282 (Div. 1)	8
1010	Helping People	Codeforces		Codeforces Round #282 (Div. 1) & Codeforces Round #282 (Div. 2)	8
1011	Game with Strings	Codeforces		Codeforces Round #275 (Div. 1) & Codeforces Round #275 (Div. 2)	8
1012	Parcels	Codeforces		Codeforces Round #274 (Div. 1)	8
1013	Alex and Complicated Task	Codeforces		Codeforces Round #267 (Div. 2)	8
1014	World of Darkraft - 2	Codeforces		Codeforces Round #265 (Div. 1)	8
1015	Sereja and Sets	Codeforces		Codeforces Round #243 (Div. 1)	8
1016	Biathlon Track	Codeforces		Codeforces Round #242 (Div. 2)	8
1017	Tower of Hanoi	Codeforces		Codeforces Round #230 (Div. 1) & Codeforces Round #230 (Div. 2)	8
1018	Diverse Substrings	Codeforces		Testing Round #9	8
1019	Bear and Floodlight	Codeforces		Codeforces Round #226 (Div. 2)	8
1020	Vowels	Codeforces		Codeforces Round #225 (Div. 1)	8
1021	Sereja and Intervals	Codeforces		Codeforces Round #215 (Div. 1)	8
1022	Bags and Coins	Codeforces		Codeforces Round #207 (Div. 1)	8
1023	Antichain	Codeforces		Codeforces Round #205 (Div. 2)	8
1024	Jeff and Brackets	Codeforces		Codeforces Round #204 (Div. 1) & Codeforces Round #204 (Div. 2)	8
1025	Turtles	Codeforces		Codeforces Round #202 (Div. 1)	8
1026	Xenia and Dominoes	Codeforces		Codeforces Round #199 (Div. 2)	8
1027	Painting Square	Codeforces		Codeforces Round #181 (Div. 2)	8
1028	Greg and Caves	Codeforces		Codeforces Round #179 (Div. 1)	8
1029	Shaass the Great	Codeforces		Codeforces Round #178 (Div. 2)	8
1030	Positions in Permutations	Codeforces		Codeforces Round #175 (Div. 2)	8
1031	Cows and Cool Sequences	Codeforces		Codeforces Round #174 (Div. 1)	8
1032	The Minimum Number of Variables	Codeforces		Codeforces Round #171 (Div. 2)	8
1033	Maxim and Increasing Subsequence	Codeforces		Codeforces Round #160 (Div. 1)	8
1034	Petya and Coloring	Codeforces		Codeforces Beta Round #85 (Div. 1 Only)	8
1035	Triangles	Codeforces		Codeforces Beta Round #13	8
1036	The Child and Polygon	Codeforces		Codeforces Round #250 (Div. 2) & Codeforces Round #250 (Div. 1)	8
1037	Roads in Yusland	Codeforces		Codeforces Round #352 (Div. 1)	8
1038	Vanya and Balloons	Codeforces		Codeforces Round #355 (Div. 2)	8
1039	Two Melodies	Codeforces		Educational Codeforces Round 22	8
1040	Ostap and Tree	Codeforces		Codeforces Round #382 (Div. 2) & Codeforces Round #382 (Div. 1)	8
1041	Michael and Charging Stations	Codeforces		Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises)	8
1042	Find a car	Codeforces		Codeforces Round #415 (Div. 1) & Codeforces Round #415 (Div. 2)	8
1043	Gosha is hunting	Codeforces		Codeforces Round #381 (Div. 1)	8
1044	An unavoidable detour for home	Codeforces		Codeforces Round #418 (Div. 2)	8
1045	Mishka and Divisors	Codeforces		Codeforces Round #365 (Div. 2)	8
1046	E-The dynamic programming problem2	TJU			8
1047	Liars and Serge	Codeforces		Codeforces Round #156 (Div. 1)	9
1048	Dormitory	Codeforces		Codeforces Round #155 (Div. 2)	9
1049	Donkey and Stars	Codeforces		Codeforces Round #152 (Div. 1)	9
1050	Piglet's Birthday	Codeforces		Codeforces Round #152 (Div. 2) & Codeforces Round #152 (Div. 1)	9
1051	Meeting Her	Codeforces		Codeforces Round #148 (Div. 1)	9
1052	Quick Tortoise	Codeforces		Codeforces Round #144 (Div. 1)	9
1053	Little Elephant and Triangle	Codeforces		Codeforces Round #136 (Div. 1)	9
1054	Formurosa	Codeforces		Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2)	9
1055	Cowboys	Codeforces		VK Cup 2012 Finals (unofficial online-version)	9
1056	Little Elephant and Retro Strings	Codeforces		Codeforces Round #129 (Div. 1)	9
1057	Brand New Problem	Codeforces		Codeforces Round #127 (Div. 1)	9
1058	T-shirt	Codeforces		Croc Champ 2012 - Final	9
1059	Hyper String	Codeforces		Croc Champ 2012 - Round 2	9
1060	Power Defence	Codeforces		Codeforces Round #115	9
1061	Plane of Tanks: Duel	Codeforces		Codeforces Round #115	9
1062	Shoe Store	Codeforces		Codeforces Round #113 (Div. 2)	9
1063	Garden	Codeforces		Codeforces Round #108 (Div. 2)	9
1064	Mission Impassable	Codeforces		Codeforces Round #107 (Div. 1)	9
1065	World of Darkraft	Codeforces		Codeforces Beta Round #99 (Div. 1)	9
1066	Unambiguous Arithmetic Expression	Codeforces		Codeforces Beta Round #87 (Div. 1 Only)	9
1067	Crime Management	Codeforces		Codeforces Beta Round #83 (Div. 1 Only)	9
1068	Arrangement	Codeforces		Codeforces Beta Round #83 (Div. 1 Only) & Codeforces Beta Round #83 (Div. 2 Only)	9
1069	Candies and Stones	Codeforces		Codeforces Beta Round #79 (Div. 1 Only)	9
1070	Horse Races	Codeforces		Codeforces Beta Round #77 (Div. 1 Only) & Codeforces Beta Round #77 (Div. 2 Only)	9
1071	Lostborn	Codeforces		Codeforces Beta Round #76 (Div. 1 Only)	9
1072	Flags	Codeforces		Codeforces Beta Round #76 (Div. 1 Only)	9
1073	Two Subsequences	Codeforces		Codeforces Beta Round #72 (Div. 1 Only)	9
1074	Pairs	Codeforces		Yandex.Algorithm Open 2011 Qualification 1	9
1075	Domino Carpet	Codeforces		Codeforces Beta Round #69 (Div. 1 Only)	9
1076	Hanger	Codeforces		Codeforces Beta Round #68	9
1077	Nuclear Fusion	Codeforces		Codeforces Beta Round #65 (Div. 2)	9
1078	Information Reform	Codeforces		Codeforces Beta Round #64	9
1079	Half-decay tree	Codeforces		Codeforces Beta Round #62	9
1080	Sequence of Balls	Codeforces		Manthan 2011	9
1081	Journey	Codeforces		Codeforces Beta Round #53	9
1082	Writing a Song	Codeforces		Codeforces Beta Round #50	9
1083	Caterpillar	Codeforces		Codeforces Beta Round #48	9
1084	Ivan the Fool VS Gorynych the Dragon	Codeforces		School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules)	9
1085	Moon Craters	Codeforces		School Team Contest #1 (Winter Computer School 2010/11)	9
1086	Smart Boy	Codeforces		School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules)	9
1087	Lesson Timetable	Codeforces		Codeforces Beta Round #37	9
1088	Triangles	Codeforces		Codeforces Beta Round #15	9
1089	Faryuks	Timus			9
1090	Steaks on Board	Timus			9
1091	Candy Store	Live Archive	2012	North America - Southeast USA	9
1092	StackingBoxes	TopCoder		SRM 261 - Div1 hard] (7995)	9
1093	And Yet Another Bracket Sequence	Codeforces		VK Cup 2015 - Round 1	9
1094	Four Divisors	Codeforces		Educational Codeforces Round 12	9
1095	Transforming Sequence	Codeforces		AIM Tech Round (Div. 1)	9
1096	A Museum Robbery	Codeforces		Codeforces Round #333 (Div. 1)	9
1097	Sandy and Nuts	Codeforces		Codeforces Round #332 (Div. 2)	9
1098	Wilbur and Strings	Codeforces		Codeforces Round #331 (Div. 2)	9
1099	Strange Calculation and Cats	Codeforces		Codeforces Round #329 (Div. 2)	9
1100	Polycarp's Masterpiece	Codeforces		2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred)	9
1101	Bear and Cavalry	Codeforces		Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1)	9
1102	Gerald and Path	Codeforces		Codeforces Round #313 (Div. 1)	9
1103	Superhero's Job	Codeforces		VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only)	9
1104	Tavas in Kansas	Codeforces		Codeforces Round #299 (Div. 1)	9
1105	Simplified Nonogram	Codeforces		Codeforces Round #298 (Div. 2)	9
1106	Pasha and Pipe	Codeforces		Codeforces Round #293 (Div. 2)	9
1107	Subarray Cuts	Codeforces		Rockethon 2015	9
1108	Subarray Cuts	Codeforces		Rockethon 2015	9
1109	Fox And Travelling	Codeforces		Codeforces Round #290 (Div. 1)	9
1110	New Year Shopping	Codeforces		Good Bye 2014	9
1111	Stairs and Lines	Codeforces		Codeforces Round #284 (Div. 1)	9
1112	Random Function and Tree	Codeforces		Codeforces Round #275 (Div. 1)	9
1113	Dreamoon and Binary	Codeforces		Codeforces Round #272 (Div. 1)	9
1114	Little Pony and Elements of Harmony	Codeforces		Codeforces Round #259 (Div. 1)	9
1115	Valera and Number	Codeforces		Codeforces Round #252 (Div. 2)	9
1116	Berland Federalization	Codeforces		Testing Round #10	9
1117	Pudding Monsters	Codeforces		Zepto Code Rush 2014	9
1118	Tachibana Kanade's Tofu	Codeforces		Codeforces Round #248 (Div. 2) & Codeforces Round #248 (Div. 1)	9
1119	Largest Submatrix 3	Codeforces		Codeforces Round #239 (Div. 1)	9
1120	Game with Points	Codeforces		Testing Round #9	9
1121	Ksenia and Combinatorics	Codeforces		Codeforces Round #224 (Div. 2)	9
1122	Red and Black Tree	Codeforces		Codeforces Round #221 (Div. 1)	9
1123	Xenia and String Problem	Codeforces		Codeforces Round #207 (Div. 1)	9
1124	Transferring Pyramid	Codeforces		Codeforces Round #206 (Div. 1)	9
1125	Game with Strings	Codeforces		Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2)	9
1126	Pilgrims	Codeforces		Codeforces Round #202 (Div. 1)	9
1127	Rectangles and Square	Codeforces		MemSQL start[c]up Round 2 - online version	9
1128	Binary Key	Codeforces		Codeforces Round #193 (Div. 2)	9
1129	The Great Julya Calendar	Codeforces		ABBYY Cup 3.0 - Finals (online version)	9
1130	The Great Julya Calendar	Codeforces		ABBYY Cup 3.0 - Finals (online version)	9
1131	Ciel and Flipboard	Codeforces		Codeforces Round #190 (Div. 1)	9
1132	PE Lesson	Codeforces		ABBYY Cup 3.0	9
1133	PE Lesson	Codeforces		ABBYY Cup 3.0	9
1134	PE Lesson	Codeforces		ABBYY Cup 3.0	9
1135	Sereja and Squares	Codeforces		Codeforces Round #187 (Div. 1)	9
1136	Yaroslav and Arrangements	Codeforces		Codeforces Round #182 (Div. 1)	9
1137	Polo the Penguin and Lucky Numbers	Codeforces		Codeforces Round #177 (Div. 1)	9
1138	Google Code Jam	Codeforces		Codeforces Round #170 (Div. 1)	9
1139	Dima and Game	Codeforces		Codeforces Round #167 (Div. 1)	9
1140	Dima and Figure	Codeforces		Codeforces Round #167 (Div. 1)	9
1141	Maximum Waterfall	Codeforces		Codeforces Round #165 (Div. 1)	9
1142	Wall Bars	Codeforces		Codeforces Round #164 (Div. 2)	9
1143	Roadside Trees	Codeforces		Codeforces Round #162 (Div. 1)	9
1144	Colorful Stones	Codeforces		Codeforces Round #162 (Div. 1)	9
1145	Rhombus	Codeforces		Codeforces Round #161 (Div. 2)	9
1146	Maxim and Calculator	Codeforces		Codeforces Round #160 (Div. 1)	9
1147	Representative Sampling	Codeforces		ABBYY Cup 2.0 - Hard	9
1148	Maze	Codeforces		Codeforces Beta Round #92 (Div. 1 Only)	9
1149	Maximum Longest Increasing Subsequence	CodeChef			9
1150	Research Rover	Codeforces		Intel Code Challenge Elimination Round (Div. 1 + Div. 2, combined)	9
1151	Singer House	Codeforces		Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals)	9
1152	Hitchhiking in the Baltic States	Codeforces		Codeforces Round #415 (Div. 1)	9
1153	Black Widow	Codeforces		Codeforces Round #366 (Div. 1) & Codeforces Round #366 (Div. 2)	9
1154	Road to Home	Codeforces		Codeforces Round #374 (Div. 2)	9
1155	DFS	Codeforces		Lyft Level 5 Challenge 2018 - Final Round	9
1156	Fibonacci String Subsequences	Codeforces		Educational Codeforces Round 39 (Rated for Div. 2)	9
1157	Tree and Table	Codeforces		Codeforces Round #153 (Div. 1)	10
1158	Cubes	Codeforces		Codeforces Round #150 (Div. 1)	10
1159	Doe Graphs	Codeforces		Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2)	10
1160	Clever Fat Rat	Codeforces		Codeforces Round #118 (Div. 1) & Codeforces Round #118 (Div. 2)	10
1161	Mrs. Hudson's Pancakes	Codeforces		Codeforces Round #110 (Div. 1)	10
1162	Hellish Constraints	Codeforces		Codeforces Beta Round #99 (Div. 1)	10
1163	Help Shrek and Donkey	Codeforces		Codeforces Beta Round #78 (Div. 1 Only)	10
1164	Mutation	Codeforces		All-Ukrainian School Olympiad in Informatics	10
1165	World Evil	Codeforces		Codeforces Beta Round #58	10
1166	Expression	Codeforces		Codeforces Beta Round #54 (Div. 2)	10
1167	The Great Marathon	Codeforces		School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules)	10
1168	Dynamic Assignment Problem	SPOJ			10
1169	Dynamic Programming	A2 Online Judge			10
1170	Geometry	Live Archive	2005	Asia - Kolkata	10
1171	To Hack or not to Hack	Codeforces		CROC 2016 - Final Round [Private, For Onsite Finalists Only]	10
1172	Combining Slimes	Codeforces		Wunder Fund Round 2016 (Div. 1 + Div. 2 combined)	10
1173	Puzzle Lover	Codeforces		Codeforces Round #339 (Div. 1)	10
1174	Simba on the Circle	Codeforces		Educational Codeforces Round 4	10
1175	Digits of Number Pi	Codeforces		Codeforces Round #325 (Div. 1)	10
1176	Boolean Function	Codeforces		Codeforces Round #323 (Div. 1)	10
1177	Number of Binominal Coefficients	Codeforces		Codeforces Round #323 (Div. 1)	10
1178	Kojiro and Furrari	Codeforces		Codeforces Round #322 (Div. 2)	10
1179	Longest Increasing Subsequence	Codeforces		Codeforces Round #315 (Div. 1)	10
1180	Kyoya and Train	Codeforces		Codeforces Round #309 (Div. 1)	10
1181	Inversions problem	Codeforces		Rockethon 2015	10
1182	Subsequences Return	Codeforces		Codeforces Round #283 (Div. 1)	10
1183	Permanent	Codeforces		Codeforces Round #268 (Div. 1)	10
1184	An easy problem about trees	Codeforces		MemSQL Start[c]UP 2.0 - Round 2	10
1185	Jzzhu and Squares	Codeforces		Codeforces Round #257 (Div. 1)	10
1186	Banners	Codeforces		Zepto Code Rush 2014	10
1187	Colored Jenga	Codeforces		Codeforces Round #242 (Div. 2)	10
1188	Stock Trading	Codeforces		Rockethon 2014	10
1189	New Year Cactus	Codeforces		Good Bye 2013	10
1190	Cookie Clicker	Codeforces		Codeforces Round #222 (Div. 1)	10
1191	Summer Reading	Codeforces		Codeforces Round #217 (Div. 2)	10
1192	Vasily the Bear and Painting Square	Codeforces		Codeforces Round #195 (Div. 2)	10
1193	Buy One, Get One Free	Codeforces		MemSQL start[c]up Round 2 - online version	10
1194	Counting Skyscrapers	Codeforces		MemSQL start[c]up Round 2 - online version	10
1195	Deja Vu	Codeforces		ABBYY Cup 3.0 - Finals (online version)	10
1196	Random Ranking	Codeforces		Codeforces Round #183 (Div. 1)	10
1197	Sequence Transformation	Codeforces		Codeforces Round #172 (Div. 1)	10
1198	Galaxy Union	Codeforces		School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules)	10
1199	School	Codeforces		School Team Contest #3 (Winter Computer School 2010/11)	10
1200	Forward, march!	Codeforces		Codeforces Beta Round #11	10
1201	#dynamic-programming&nbsp;(168)</span>	SPOJ			10
1202	Longest Subsequence	Live Archive	2004	Asia - Manila	10
1203	Selling Numbers	Codeforces		Codeforces Round #402 (Div. 1)	10
1204	Shake It!	Codeforces		Codeforces Round #431 (Div. 1)	10
1205	Sloth	Codeforces		Codeforces Round #446 (Div. 1)	10
1206	Mod Mod Mod	Codeforces		Codeforces Round #445 (Div. 1, based on Technocup 2018 Elimination Round 3)	10
1207	Numbers on the blackboard	Codeforces		Codeforces Round #443 (Div. 1)	10
1208	Caramel Clouds	Codeforces		Codeforces Round #426 (Div. 1)	10
1209	Days of Floral Colours	Codeforces		Codeforces Round #431 (Div. 1)	10
1210	Ada and Zoo	SPOJ			10
1211	Dynamic Shortest Path	Codeforces		AIM Tech Round 4 (Div. 1)	10