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Dynamic Programming problems
Problem Name Online Judge Year Contest Difficulty Level
1 Roads Categories SPOJ 1
2 The Twin Towers Categories UVA 1
3 Metro Categories Timus 1
4 23 out of 5 Categories UVA 1
5 Assignments Categories SPOJ 1
6 Soft Drinking Categories Codeforces Codeforces Round #107 (Div. 2) 1
7 Bytelandian gold coins Categories SPOJ 1
8 Longest Common Subsequence Categories UVA 1
9 Party Schedule Categories SPOJ 1
10 Dividing coins Categories UVA 1
11 Tiling a Grid With Dominoes Categories SPOJ 1
12 Square Country Categories Timus 1
13 Is Bigger Smarter? Categories UVA 1
14 Given Length and Sum of Digits... Categories Codeforces Codeforces Round #277.5 (Div. 2) 1
15 Aibohphobia Categories SPOJ 1
16 The Great Ball Categories SPOJ 1
17 Trip Categories SPOJ 1
18 Fool the Police Categories SPOJ 1
19 Fibo Categories A2 Online Judge 1
20 Getting in Line Categories UVA 1
21 Largest Submatrix Categories UVA 1
22 T-primes Categories Codeforces Codeforces Round #142 (Div. 2) 1
23 The Tower of Babylon Categories UVA 1
24 Pocket Money Categories SPOJ 1
25 Training for final Categories SPOJ 1
26 Cross-country Categories SPOJ 1
27 THE DRUNK JAILER Categories PKU 1
28 Mixtures Categories SPOJ 1
29 K-based Numbers Categories Timus 1
30 Fishmonger Categories SPOJ 1
31 Luggage Categories UVA 1
32 Square Brackets Categories SPOJ 1
33 The Double HeLiX Categories SPOJ 1
34 Maximum Sum Categories UVA 1
35 Longest Run on a Snowboard Categories UVA 1
36 Martian Mining Categories SPOJ 1
37 Bee Walk Categories SPOJ 1
38 Alphacode Categories SPOJ 1
39 Coin Change Categories UVA 1
40 Hotels Along the Croatian Coast Categories SPOJ 1
41 Philosophers Stone Categories SPOJ 1
42 Binary Apple Tree Categories Timus 1
43 The 3n + 1 problem Categories UVA 1
44 Cutting Sticks Categories UVA 1
45 Testing the CATCHER Categories UVA 1
46 Scientific Conference Categories Timus 1
47 Distinct Subsequences Categories UVA 1
48 Rent your airplane and make money Categories SPOJ 1
49 Chocolate Categories SPOJ 1
50 Stacking Boxes Categories UVA 1
51 Feynman Categories SPOJ 1
52 To the Max Categories PKU 1
53 Help the soldier Categories SPOJ 1
54 Hangover Categories PKU 1
55 Edit distance Categories SPOJ 1
56 SuperSale Categories UVA 1
57 No Change Categories SPOJ 1
58 DIE HARD Categories SPOJ 1
59 Candy Categories Live Archive 2008 Latin America - South America 1
60 BLAST Categories SPOJ 1
61 Binary Lexicographic Sequence Categories Timus 1
62 Ice Sculptures Categories Codeforces VK Cup 2012 Qualification Round 1 1
63 Rectangles Perimeter Categories SPOJ 1
64 Sweet and Sour Rock Categories SPOJ 1
65 Staircases Categories Timus 1
66 Let Me Count The Ways Categories UVA 1
67 Vacation Categories UVA 1
68 Cheap Travel Categories Codeforces Codeforces Round #266 (Div. 2) 1
69 Lucky Tickets Categories Timus 1
70 Piggy-Bank Categories SPOJ 1
71 History Grading Categories UVA 1
72 Two Ends Categories SPOJ 1
73 DNA Sequences Categories SPOJ 1
74 Vertex Cover Categories SPOJ 1
75 Membership Management Categories Live Archive 2010 Asia - Tokyo 1
76 Divisibility Categories UVA 1
77 Sums in a Triangle Categories SPOJ 1
78 Enormous Input Test Categories CodeChef 1
79 The Knapsack Problem Categories SPOJ 1
80 Army Categories Codeforces School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) 1
81 Aliens at the train Categories SPOJ 1
82 Seinfeld Categories SPOJ 1
83 Exponentiation Categories PKU 1
84 Easy Longest Increasing Subsequence Categories SPOJ 1
85 Distinct Subsequences Categories SPOJ 1
86 Homer Simpson Categories UVA 1
87 Tri graphs Categories SPOJ 1
88 Non-Decreasing Digits Categories SPOJ 1
89 Longest Palindrome Categories UVA 1
90 Tiling Up Blocks Categories Live Archive 2003 Asia - Kaohsiung 1
91 Optimal Array Multiplication Sequence Categories UVA 1
92 Sum of Digits Categories SPOJ 1
93 Candy Categories SPOJ 1
94 Compromise Categories UVA 1
95 Coins Game Categories SPOJ 1
96 Maximum Sum Categories Timus 1
97 Fibonacci Words Categories Live Archive 2012 World Finals - Warsaw 1
98 Grandpa's Walk Categories Live Archive 2012 Asia - Jakarta 1
99 Tower of Babylon Categories SPOJ 1
100 Dollars Categories UVA 1
101 Strategic Defense Initiative Categories UVA 1
102 Summing to a Square Prime Categories SPOJ 1
103 Railway Tickets Categories Timus 1
104 Permutations Categories SPOJ 1
105 Ingenuous Cubrency Categories UVA 1
106 Flags Categories Timus 1
107 Fibonacci Freeze Categories UVA 1
108 Palindrome 2000 Categories SPOJ 1
109 Unidirectional TSP Categories UVA 1
110 Scuba diver Categories SPOJ 1
111 Cut Ribbon Categories Codeforces Codeforces Round #119 (Div. 2) 1
112 Prime Permutations Categories CodeChef 1
113 Treats for the Cows Categories SPOJ 1
114 Magic Grid Categories SPOJ 1
115 Ultra-Fast Mathematician Categories Codeforces Codeforces Beta Round #57 (Div. 2) 1
116 A+B Problem Categories PKU 1
117 LATGACH3 Categories SPOJ 1
118 Phidias Categories SPOJ 1
119 In Danger Categories SPOJ 1
120 Making Change Categories TJU 1
121 Take the Land Categories UVA 1
122 K-based Numbers. Version 2 Categories Timus 1
123 Tile Code Categories Live Archive 2007 Asia - Seoul 1
124 Adjacent Bit Counts Categories SPOJ 1
125 How do you add? Categories UVA 1
126 0110SS Categories SPOJ 1
127 Chop Ahoy! Revisited! Categories SPOJ 1
128 Interesting number Categories SPOJ 2
129 Nudnik Photographer Categories Timus 2
130 COSTLY CHESS Categories SPOJ 2
131 Point Connection Game in a Circle Categories SPOJ 2
132 Simple Minded Hashing Categories UVA 2
133 Counting The Way of Bracket Replacement Categories SPOJ 2
134 Divisible Group Sums Categories UVA 2
135 Ministry Categories Timus 2
136 Trouble of 13-Dots Categories UVA 2
137 k-Tree Categories Codeforces Codeforces Round #247 (Div. 2) 2
138 Pearls Categories Live Archive 2002 Europe - Northwestern 2
139 Beautiful People Categories SGU 2
140 Weights and Measures Categories UVA 2
141 Black-White Grid Categories Live Archive 2006 Asia - Hanoi 2
142 Pebble Solitaire Categories UVA 2
143 George and Job Categories Codeforces Codeforces Round #267 (Div. 2) 2
144 Orchard Trees Categories UVA 2
145 Nested Dolls Categories SPOJ 2
146 The Bale Tower Categories TJU 2
147 String Distance and Transform Process Categories UVA 2
148 Save Thy Toys Categories SPOJ 2
149 The least round way Categories Codeforces Codeforces Beta Round #2 2
150 Always on the run Categories UVA 2
151 NERED Categories SPOJ 2
152 Game Show Math Categories UVA 2
153 Card Sorting Categories SPOJ 2
154 The Marriage Interview :-) Categories UVA 2
155 Walking on the Safe Side Categories UVA 2
156 Decoding Morse Sequences Categories SPOJ 2
157 Bicolored Horses Categories Timus 2
158 Equal Sum Sets Categories Live Archive 2013 Asia - Aizu 2
159 Particular Palindromes Categories SPOJ 2
160 Space Elevator Categories PKU 2
161 Yoda Goes Palindromic ! Categories SPOJ 2
162 Anniversary Party Categories Timus 2
163 Chilly Willy Categories Codeforces Codeforces Round #152 (Div. 2) 2
164 Up Subsequence Categories SPOJ 2
165 Painting the balls Categories SGU 2
166 Three-coloring of binary trees Categories SPOJ 2
167 Chopsticks Categories UVA 2
168 Threeprime Numbers Categories Timus 2
169 Rain Categories SPOJ 2
170 Collecting Beepers Categories UVA 2
171 Boredom Categories Codeforces Codeforces Round #260 (Div. 1) & Codeforces Round #260 (Div. 2) 2
172 Tetrahedron Categories Codeforces Codeforces Round #113 (Div. 2) 2
173 Problem 3 Categories SPOJ 2
174 Dab of Backpack Categories SPOJ 2
175 Catch Fish Categories SPOJ 2
176 String Computer Categories UVA 2
177 Dice Categories SPOJ 2
178 Marks Distribution Categories UVA 2
179 Tiling Categories UVA 2
180 Con-Junctions Categories SPOJ 2
181 JEDNAKOST Categories SPOJ 2
182 Mobile Service Categories SPOJ 2
183 Jugs Categories UVA 2
184 Sorting is not easy Categories SPOJ 2
185 ACM (ACronymMaker) Categories SPOJ 2
186 Diving for Gold Categories UVA 2
187 False Mirrors Categories Timus 2
188 Generations of Tribbles Categories Live Archive 2013 North America - Pacific Northwest 2
189 Physics Practical Categories Codeforces Codeforces Round #154 (Div. 2) 2
190 Partition Categories SPOJ 2
191 Activities Categories SPOJ 2
192 Temptation Island Categories SPOJ 2
193 Little Elephant and Painting Categories CodeChef 2
194 Black or White Categories SPOJ 2
195 Palindrome pairs Categories Codeforces VK Cup 2012 Qualification Round 2 2
196 Building Bridges Categories SPOJ 2
197 String to Palindrome Categories UVA 2
198 Another Problem on Strings Categories Codeforces Codeforces Round #112 (Div. 2) 2
199 Another Tree Problem Categories SPOJ 2
200 Feline Olympics - Mouseball Categories SPOJ 2
201 Robot Instructions Categories UVA 2
202 Making A Budget Categories SPOJ 2
203 Before an Exam Categories Codeforces Codeforces Beta Round #4 (Div. 2 Only) 2
204 Tourist Categories SPOJ 2
205 Blueberries Categories SPOJ 2
206 Flight Planner Categories UVA 2
207 Segments Categories Timus 2
208 Optimal Binary Search Tree Categories UVA 2
209 Murcia's Skyline Categories UVA 2
210 Musketeers Categories SPOJ 2
211 String problem Categories SPOJ 2
212 Bit Mask Categories UVA 2
213 MAXIMUM WOOD CUTTER Categories SPOJ 2
214 Longest Match Categories UVA 2
215 Game of Sum Categories UVA 2
216 Queue Categories UVA 2
217 I-Keyboard Categories SPOJ 2
218 Maximum Absurdity Categories Codeforces Codeforces Round #193 (Div. 2) 2
219 Flowers Categories Codeforces Codeforces Round #271 (Div. 2) 2
220 Travelling Salesman Categories UVA 2
221 Street Categories SPOJ 2
222 Milliard Vasya's Function Categories Timus 2
223 XOR Maximization Categories SPOJ 2
224 Pilots Categories SPOJ 2
225 Bar Codes Categories UVA 2
226 Another Box Problem Categories SPOJ 2
227 Make Palindrome Categories UVA 2
228 Cow Frisbee Team Categories TJU 2
229 Wedding shopping Categories UVA 2
230 Again Palindrome Categories UVA 2
231 Drop the Triples Categories Live Archive 2007 Latin America - South America 2
232 Tower of Cubes Categories UVA 2
233 Slurpys Categories UVA 2
234 The Courier Categories SPOJ 2
235 Minus Operation Categories SPOJ 3
236 Minimal Coverage Categories Timus 3
237 Esferas Categories SPOJ 3
238 Weather Categories Codeforces Codeforces Round #145 (Div. 2, ACM-ICPC Rules) 3
239 Pebbles Categories Live Archive 2007 North America - Pacific Northwest & North America - Southern California 3
240 Balancing the Stone Categories SPOJ 3
241 Little Elephant and Movies Categories CodeChef 3
242 Choosing Capital for Treeland Categories Codeforces Codeforces Round #135 (Div. 2) 3
243 String Shuffle Categories SPOJ 3
244 Intervals of Monotonicity Categories Timus 3
245 Pleasing Chief Categories CodeChef 3
246 RGBStreet Categories TopCoder SRM 325 - Div2 medium] (10005) 3
247 I-Keyboard Categories Live Archive 2000 Europe - Central 3
248 Scheduling Lectures Categories UVA 3
249 Buns Categories Codeforces Codeforces Beta Round #82 (Div. 2) 3
250 Fast Food Categories UVA 3
251 How Many O's? Categories UVA 3
252 Password Categories Codeforces Codeforces Beta Round #93 (Div. 1 Only) & Codeforces Beta Round #93 (Div. 2 Only) 3
253 BATMAN3 Categories SPOJ 3
254 Polygon Categories SPOJ 3
255 String Partition Categories UVA 3
256 Bag of mice Categories Codeforces Codeforces Round #105 (Div. 2) 3
257 Caesar's Legions Categories Codeforces Codeforces Beta Round #89 (Div. 2) 3
258 Gentlemen Categories Timus 3
259 Hierarchy Categories Timus 3
260 Determine it Categories UVA 3
261 Fortune Telling Categories Codeforces Codeforces Beta Round #55 (Div. 2) 3
262 Candy (Again) Categories SPOJ 3
263 Erdos Numbers Categories Live Archive 2000 Europe - Northwestern & Europe - Southwestern & Europe - Mid-Central 3
264 Sereja and Game Categories CodeChef 3
265 The Matrix Game Categories CodeChef 3
266 Hometask Categories Codeforces Codeforces Round #131 (Div. 2) 3
267 Paid Roads Categories SPOJ 3
268 Gargari and Permutations Categories Codeforces Codeforces Round #264 (Div. 2) 3
269 Fetching Cooking Tools Categories CodeChef 3
270 ZigZag Categories TopCoder TCCC '03 Semifinals 3 - Div1 easy] (4493) 3
271 Walking Around Wisely Categories UVA 3
272 Counting K-Rectangle Categories SPOJ 3
273 Menu Categories SPOJ 3
274 Color Stripe Categories Codeforces Codeforces Round #135 (Div. 2) 3
275 Mosaic Categories Live Archive 2009 North America - Southeast USA 3
276 Crime Wave - The Sequel Categories UVA 3
277 Hippity Hopscotch Categories UVA 3
278 Mysterious Present Categories Codeforces Codeforces Beta Round #4 (Div. 2 Only) 3
279 Help Bob Categories SPOJ 3
280 Many Paths, One Destination Categories UVA 3
281 Sum of Different Primes Categories UVA 3
282 Brackets Sequence Categories Timus 3
283 End up with More Teams Categories UVA 3
284 Mnemonics and Palindromes Categories Timus 3
285 Fibonacci System Categories Live Archive 2008 Europe - Northeastern 3
286 Most Servings Meal Categories SPOJ 3
287 Slikar Categories SPOJ 3
288 Little Red Riding Hood Categories UVA 3
289 Deliver pizza Categories SPOJ 3
290 Chop Ahoy! Revisited! Categories Live Archive 2005 Africa/Middle East - Arab and North Africa 3
291 Maximum Triangle Area Categories SPOJ 3
292 Chest of Drawers Categories UVA 3
293 Free Candies Categories UVA 3
294 Longest Regular Bracket Sequence Categories Codeforces Codeforces Beta Round #5 3
295 Antimatter Ray Clearcutting Categories UVA 3
296 Partition the sequence Categories SPOJ 3
297 Cards, bags and coins Categories CodeChef 3
298 Barcode Categories Codeforces Codeforces Round #139 (Div. 2) 3
299 Zeta-Nim Game Categories CodeChef 3
300 Sense of Beauty Categories Timus 3
301 To Add or Not to Add Categories Codeforces Codeforces Round #143 (Div. 2) 3
302 Distance in Tree Categories Codeforces VK Cup 2012 Round 1 3
303 Leaves Categories SPOJ 3
304 Magic, Wizardry and Wonders Categories Codeforces Codeforces Round #143 (Div. 2) 3
305 BadNeighbors Categories TopCoder TCCC '04 Round 4 - Div1 easy] (5009) 3
306 Even Palindrome Categories SPOJ 3
307 Traveling by Stagecoach Categories SPOJ 3
308 Budget Travel Categories UVA 3
309 Bribe the Prisoners Categories SPOJ 3
310 Dominoes Categories SPOJ 4
311 Malevich Strikes Back! Categories Timus 4
312 The Secret of an Aerolite Categories SPOJ 4
313 Destruction Cannon Categories URI 4
314 Little Elephant and Interval Categories Codeforces Codeforces Round #129 (Div. 1) & Codeforces Round #129 (Div. 2) 4
315 One-two, One-two 2 Categories Timus 4
316 Beautiful Numbers Categories UVA 4
317 Handball Categories UVA 4
318 Raucous Rockers Categories UVA 4
319 Pashmak and Graph Categories Codeforces Codeforces Round #261 (Div. 2) 4
320 Bargaining Table Categories Codeforces Codeforces Beta Round #22 (Div. 2 Only) 4
321 Najkraci Categories SPOJ 4
322 Many polygons Categories SPOJ 4
323 Let go to the movies Categories SPOJ 4
324 Tiling Dominoes Categories UVA 4
325 Hackers' Crackdown Categories UVA 4
326 Mars Canals Categories Timus 4
327 Drop the Triples Categories SPOJ 4
328 Dumb Bones Categories UVA 4
329 Matches Categories UVA 4
330 IOI07 Miners Categories SPOJ 4
331 Palindromic Subsequence Categories UVA 4
332 Best Coalitions Categories UVA 4
333 Little Pony and Harmony Chest Categories Codeforces Codeforces Round #259 (Div. 1) & Codeforces Round #259 (Div. 2) 4
334 Phone Talks Categories Codeforces VK Cup 2012 Qualification Round 1 4
335 Hometask Categories Codeforces Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2) 4
336 Communication Fiend Categories Timus 4
337 Zeros and Ones Categories UVA 4
338 Substring and Subsequence Categories Codeforces VK Cup 2012 Round 2 4
339 Digit Sum Categories UVA 4
340 COUNT PAREN Categories SPOJ 4
341 AGTC Categories UVA 4
342 Probablistic OR Categories SPOJ 4
343 Train Categories Codeforces Codeforces Beta Round #68 4
344 Boy Scouts Categories SPOJ 4
345 Folding Categories Timus 4
346 SMS Categories Timus 4
347 Building Bridges(HARD) Categories SPOJ 4
348 Minion Circle Categories CodeChef 4
349 Fewest Flops Categories UVA 4
350 Bottle Taps Categories Timus 4
351 Lemon Tale Categories Timus 4
352 Message Categories Codeforces Codeforces Round #110 (Div. 1) & Codeforces Round #110 (Div. 2) 4
353 Little Elephant and Blocks Categories CodeChef 4
354 BATMAN1 Categories SPOJ 4
355 Chocolate Box Categories UVA 4
356 Matchsticks Categories TJU 4
357 Spiders Categories Codeforces School Regional Team Contest, Saratov, 2011 4
358 Who is The Boss Categories SPOJ 4
359 Queries for Number of Palindromes Categories Codeforces CROC-MBTU 2012, Elimination Round (ACM-ICPC) 4
360 Bright Bracelet Categories Live Archive 2003 North America - Mid-Central USA 4
361 Crack Categories Timus 4
362 Account Book Categories UVA 4
363 Make Psycho Categories SPOJ 4
364 Antimonotonicity Categories UVA 4
365 Term Strategy Categories UVA 4
366 String reduction Categories SPOJ 4
367 A Lot of Games Categories Codeforces Codeforces Round #260 (Div. 1) & Codeforces Round #260 (Div. 2) 4
368 Another Assignment Problem Categories SPOJ 4
369 Chocolate Categories SPOJ 4
370 Bit by Bit Categories SPOJ 4
371 Trees Again Categories SPOJ 4
372 Common Subsequences Categories SPOJ 4
373 Almost Arithmetical Progression Categories Codeforces Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1) 5
374 Lucky Common Subsequence Categories Codeforces Codeforces Round #201 (Div. 1) & Codeforces Round #201 (Div. 2) 5
375 Independent Attacking Zones Categories UVA 5
376 Summing Slopes Categories CodeChef 5
377 Car with powers Categories SPOJ 5
378 Eternal Victory Categories Codeforces Codeforces Beta Round #57 (Div. 2) 5
379 Balanced Numbers Categories SPOJ 5
380 Dynasty Puzzles Categories Codeforces Codeforces Round #121 (Div. 1) & Codeforces Round #121 (Div. 2) 5
381 Mr. Kitayuta, the Treasure Hunter Categories Codeforces Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) 5
382 Roadworks Categories Timus 5
383 Wonderful Randomized Sum Categories Codeforces Codeforces Beta Round #33 (Codeforces format) 5
384 Sereja and Bubble Sort Categories CodeChef 5
385 File List Categories Codeforces VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) 5
386 Cinema Cashier Categories Codeforces Codeforces Beta Round #10 5
387 Optimal Cut Categories UVA 5
388 Two out of Three Categories Codeforces Yandex.Algorithm 2011 Qualification 2 5
389 Gasoline Station Categories Timus 5
390 Allergy Test Categories UVA 5
391 Clear Symmetry Categories Codeforces Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2) 5
392 Subsequence Problem Categories SPOJ 5
393 Cargo Agency Categories Timus 5
394 Patches Categories URI 5
395 Partial Teacher Categories Codeforces Manthan 2011 5
396 Increase Sequence Categories Codeforces Codeforces Round #266 (Div. 2) 5
397 BATMAN4 Categories SPOJ 5
398 Petr# Categories Codeforces Codeforces Beta Round #86 (Div. 1 Only) & Codeforces Beta Round #86 (Div. 2 Only) 5
399 Fatawy Categories SPOJ 5
400 The Bridges of Kolsberg Categories UVA 5
401 Basketball Team Categories Codeforces Codeforces Beta Round #83 (Div. 1 Only) & Codeforces Beta Round #83 (Div. 2 Only) 5
402 Batman Categories UVA 5
403 Looking for Order Categories Codeforces Codeforces Beta Round #8 5
404 Convex Polygons Categories SPOJ 5
405 Porcelain Categories Codeforces Codeforces Round #105 (Div. 2) 5
406 Connect Line Segments Categories SPOJ 5
407 Train Categories Timus 5
408 Let's Play Osu! Categories Codeforces Codeforces Round #146 (Div. 1) & Codeforces Round #146 (Div. 2) 5
409 CreatureTraining Categories TopCoder TCO08 Round 2 - Div1 medium] (12012) 5
410 DNA Laboratory Categories SPOJ 5
411 Beaver Categories Codeforces Codeforces Beta Round #71 5
412 INVITATION FOR TECHOFES Categories SPOJ 5
413 Solitaire Categories Codeforces Codeforces Round #130 (Div. 2) 5
414 Decoding Genome Categories Codeforces Codeforces Round #137 (Div. 2) 5
415 Coin Changing Again Categories UVA 5
416 Classmates 2 Categories Timus 5
417 Avoiding Jungle in the Dark Categories UVA 5
418 E-mail Categories Timus 5
419 WordMath Categories TopCoder Unknown () 5
420 Paint the Tree Categories CodeChef 5
421 ICPC Team Strategy Categories UVA 5
422 Paint templates Categories SPOJ 5
423 Games with Rectangle Categories Codeforces Codeforces Beta Round #94 (Div. 1 Only) & Codeforces Beta Round #94 (Div. 2 Only) 5
424 Huffmans Greed Categories SPOJ 5
425 Candy Categories UVA 5
426 IPL - CRICKET TOURNAMENT Categories SPOJ 5
427 Little Elephant and Elections Categories Codeforces Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2) 5
428 Ship Routes Categories Timus 5
429 Police Station Categories Codeforces Codeforces Round #130 (Div. 2) 5
430 Happiness to People! Categories Timus 5
431 Expect the Expected Categories UVA 5
432 Count Digits Categories CodeChef 5
433 How many trees? Categories Codeforces Codeforces Beta Round #9 (Div. 2 Only) 5
434 Compatible Numbers Categories Codeforces Codeforces Round #112 (Div. 2) 5
435 Busy Programmer Categories UVA 5
436 Logo Turtle Categories Codeforces Codeforces Beta Round #96 (Div. 1) & Codeforces Beta Round #96 (Div. 2) 5
437 Fibonacci Words Categories UVA 6
438 Incrementing The Integer Categories SPOJ 6
439 Number Transformation Categories Codeforces Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) 6
440 GO FOR DIAMONDS Categories SPOJ 6
441 Decimation Categories Timus 6
442 Relay Race Categories Codeforces Codeforces Round #131 (Div. 1) & Codeforces Round #131 (Div. 2) 6
443 Right Triangles Categories Codeforces Codeforces Testing Round #1 6
444 BATMAN2 Categories SPOJ 6
445 Lov-e Pap Pap-e Polti Categories SPOJ 6
446 Petya and Spiders Categories Codeforces Codeforces Beta Round #85 (Div. 1 Only) & Codeforces Beta Round #85 (Div. 2 Only) 6
447 The Islands Categories UVA 6
448 Interesting Game Categories Codeforces Codeforces Beta Round #73 (Div. 1 Only) & Codeforces Beta Round #73 (Div. 2 Only) 6
449 LionAge II Categories Codeforces Codeforces Beta Round #66 6
450 Fence Categories Codeforces Codeforces Round #145 (Div. 2, ACM-ICPC Rules) & Codeforces Round #145 (Div. 1, ACM-ICPC Rules) 6
451 Beaver Game Categories Codeforces Codeforces Beta Round #70 (Div. 2) 6
452 JUMPING DORA Categories SPOJ 6
453 Towers Categories Codeforces Codeforces Round #142 (Div. 1) 6
454 Summing Slopes Categories SPOJ 6
455 Enemy is weak Categories Codeforces Codeforces Beta Round #57 (Div. 2) 6
456 Enterprise Categories Timus 6
457 The Maths Lecture Categories Codeforces Codeforces Round #287 (Div. 2) 6
458 Table Categories Codeforces Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2) 6
459 Weak Links Categories UVA 6
460 LCIS Categories Codeforces Codeforces Beta Round #10 6
461 Animals Categories Codeforces Codeforces Beta Round #35 (Div. 2) 6
462 Mystic Craft Categories SPOJ 6
463 Palindromes Categories Codeforces Codeforces Beta Round #98 (Div. 2) 6
464 Education Reform Categories Codeforces Codeforces Beta Round #90 6
465 Sort that Queue Categories Live Archive 2005 Africa/Middle East - Arab and North Africa 6
466 Buses Categories Codeforces Codeforces Beta Round #79 (Div. 1 Only) & Codeforces Beta Round #79 (Div. 2 Only) 6
467 Lucky Numbers Categories Codeforces Codeforces Beta Round #77 (Div. 1 Only) 6
468 Fragile Bridges Categories Codeforces Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2) 6
469 AlgoRace Categories Codeforces Codeforces Round #119 (Div. 1) & Codeforces Round #119 (Div. 2) 6
470 Playing War Categories UVA 6
471 Shooting Gallery Categories Codeforces Codeforces Beta Round #30 (Codeforces format) 6
472 A Simple Task Categories Codeforces Codeforces Beta Round #11 6
473 Wizards and Huge Prize Categories Codeforces Codeforces Round #114 (Div. 1) & Codeforces Round #114 (Div. 2) 6
474 Coloring Brackets Categories Codeforces Codeforces Round #106 (Div. 2) 6
475 Checkout Assistant Categories Codeforces Codeforces Beta Round #19 6
476 Yet Another Assignment Problem Categories SPOJ 6
477 Cubes Categories Codeforces Codeforces Round #116 (Div. 2, ACM-ICPC Rules) 6
478 Fish Categories Codeforces Codeforces Beta Round #16 (Div. 2 Only) 6
479 Bracket Sequence Categories SPOJ 6
480 Kalila and Dimna in the Logging Industry Categories Codeforces Codeforces Round #189 (Div. 1) & Codeforces Round #189 (Div. 2) 6
481 Game --- Mouse and Cheese Categories UVA 6
482 MagicNaming Categories TopCoder SRM 526.5 - Div2 hard] (14762) 6
483 ACM Diagnostics Categories Timus 6
484 Numbers Categories Codeforces Codeforces Round #131 (Div. 1) & Codeforces Round #131 (Div. 2) 6
485 Optical Experiment Categories Codeforces Manthan 2011 6
486 Word Cut Categories Codeforces Croc Champ 2012 - Round 2 6
487 Sequence Categories Codeforces Codeforces Beta Round #13 6
488 Cipher Categories Codeforces Codeforces Round #110 (Div. 1) & Codeforces Round #110 (Div. 2) 6
489 Number With The Given Amount Of Divisors Categories Codeforces Codeforces Beta Round #27 (Codeforces format, Div. 2) 6
490 Spiral Maximum Categories Codeforces Croc Champ 2012 - Round 1 6
491 Stripe 2 Categories Codeforces Codeforces Alpha Round #21 (Codeforces format) 6
492 Anniversary Firework Categories Timus 6
493 Let's Go Rolling! Categories Codeforces School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) 6
494 Wooden Fence Categories Codeforces Codeforces Round #117 (Div. 2) 6
495 Common Palindrome Categories UVA 6
496 The Top-Code Categories SPOJ 6
497 Lucky Subsequence Categories Codeforces Codeforces Round #104 (Div. 1) & Codeforces Round #104 (Div. 2) 6
498 Big Maximum Sum Categories Codeforces Codeforces Beta Round #67 (Div. 2) 7
499 Two Longest Paths Categories UVA 7
500 World Eater Brothers Categories Codeforces Codeforces Round #148 (Div. 1) & Codeforces Round #148 (Div. 2) 7
501 Lost in Space Categories Timus 7
502 Petya and Post Categories Codeforces Codeforces Beta Round #61 (Div. 2) 7
503 Fractal Detector Categories Codeforces Codeforces Round #141 (Div. 2) 7
504 Salary for Robots Categories Timus 7
505 Colored Tiles Categories UVA 7
506 Pawn Categories Codeforces Codeforces Beta Round #40 (Div. 2) 7
507 One-Based Arithmetic Categories Codeforces Testing Round #10 7
508 Beautiful numbers Categories Codeforces Codeforces Beta Round #51 7
509 Brainfuck Categories Timus 7
510 Cactus Categories Codeforces Codeforces Round #143 (Div. 2) 7
511 Camels Categories Codeforces Codeforces Beta Round #14 (Div. 2) 7
512 Yet Another Answer Categories Timus 7
513 Seller Bob Categories Codeforces Codeforces Beta Round #18 (Div. 2 Only) 7
514 Brainwashing Device Categories Timus 7
515 Constants in the language of Shakespeare Categories Codeforces Codeforces Beta Round #96 (Div. 1) 7
516 Anfisa the Monkey Categories Codeforces School Team Contest #2 (Winter Computer School 2010/11) 7
517 Lunar Code Categories Timus 7
518 Dot Categories Codeforces Codeforces Beta Round #63 (Div. 2) 7
519 Martian Plates Categories Timus 7
520 Name Categories Codeforces Codeforces Round #116 (Div. 2, ACM-ICPC Rules) 7
521 TheProgrammingContestDivOne Categories TopCoder SRM 502 - Div1 medium] (14431) 7
522 Flag 2 Categories Codeforces Codeforces Beta Round #18 (Div. 2 Only) 7
523 Fibonacci Sums Categories Codeforces Codeforces Beta Round #93 (Div. 1 Only) 7
524 Cats Transport Categories Codeforces Codeforces Round #185 (Div. 1) & Codeforces Round #185 (Div. 2) 7
525 Table Tennis Categories UVA 7
526 Eleven Categories UVA 7
527 Bombing Categories Codeforces Codeforces Beta Round #47 7
528 Martian Army Categories Timus 7
529 Fox And Jumping Categories Codeforces Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) 7
530 First Digit Law Categories Codeforces Codeforces Beta Round #50 7
531 Plants vs. Zombies HD SP Categories UVA 7
532 Help Caretaker Categories Codeforces Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2) 7
533 Catch Sheep Categories SPOJ 7
534 Beavermuncher-0xFF Categories Codeforces Codeforces Beta Round #69 (Div. 1 Only) & Codeforces Beta Round #69 (Div. 2 Only) 7
535 Join Categories Timus 7
536 Comb Categories Codeforces School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules) 7
537 Component Testing Categories Live Archive 2012 North America - Mid-Atlantic USA & North America - Southern California & North America - Southeast USA 7
538 Maximum Sub-sequence Product Categories Live Archive 1996 Europe - Southeastern 7
539 Eating High Categories Timus 7
540 TV Game Categories Codeforces Codeforces Beta Round #31 (Div. 2, Codeforces format) 7
541 Merry-go-round Categories Timus 7
542 Alternative Solution Categories Timus 7
543 Atomic Car Race Categories UVA 7
544 Lizards and Basements 2 Categories Codeforces Codeforces Beta Round #6 (Div. 2 Only) 7
545 Blood Cousins Return Categories Codeforces Codeforces Round #151 (Div. 2) 8
546 Little Elephant and Broken Sorting Categories Codeforces Codeforces Round #157 (Div. 1) 8
547 Genetic engineering Categories Codeforces Yandex.Algorithm 2011 Round 2 8
548 Fibonacci army Categories Codeforces Unknown Language Round #2 8
549 Lucky Country Categories Codeforces Codeforces Beta Round #77 (Div. 1 Only) 8
550 Archer's Travel Categories Timus 8
551 Multicolored Marbles Categories Codeforces VK Cup 2012 Finals, Practice Session 8
552 Bath Queue Categories Codeforces Codeforces Beta Round #28 (Codeforces format) 8
553 Smart Boy Categories Codeforces School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) 8
554 Polycarpus the Safecracker Categories Codeforces VK Cup 2012 Round 1 8
555 Defining Macros Categories Codeforces Codeforces Beta Round #7 8
556 Lostborn Categories Codeforces Codeforces Beta Round #76 (Div. 1 Only) 8
557 Ciel and Gondolas Categories Codeforces Codeforces Round #190 (Div. 1) 8
558 Common ancestor Categories Codeforces Codeforces Beta Round #46 (Div. 2) 8
559 Little Elephant and Retro Strings Categories Codeforces Codeforces Round #129 (Div. 1) 8
560 Changing a String Categories Codeforces Codeforces Beta Round #52 (Div. 2) 8
561 Dead Ends Categories Codeforces Codeforces Beta Round #49 (Div. 2) 8
562 Don't fear, DravDe is kind Categories Codeforces Codeforces Beta Round #28 (Codeforces format) 8
563 Inventory Categories UVA 8
564 Tree Categories Codeforces Codeforces Beta Round #23 8
565 2048 Categories Codeforces Coder-Strike 2014 - Round 2 8
566 Clearing Up Categories Codeforces Codeforces Round #101 (Div. 2) 8
567 Tourist Categories Codeforces All-Ukrainian School Olympiad in Informatics 8
568 Beautiful Road Categories Codeforces Codeforces Beta Round #73 (Div. 1 Only) 8
569 Lucky Arrays Categories Codeforces Codeforces Round #156 (Div. 1) 8
570 Numbers Categories Codeforces Codeforces Beta Round #72 (Div. 1 Only) 8
571 Gifts Categories Codeforces Codeforces Round #142 (Div. 1) 8
572 Phone Number Categories Codeforces School Team Contest #2 (Winter Computer School 2010/11) 8
573 Periodical Numbers Categories Codeforces Codeforces Round #132 (Div. 2) 8
574 IT Restaurants Categories Codeforces VK Cup 2012 Finals (unofficial online-version) 8
575 Sequence of Balls Categories Codeforces Manthan 2011 8
576 Broken robot Categories Codeforces Codeforces Beta Round #24 8
577 Frequent Flyer Card Categories Timus 8
578 Oil Skimming Categories A2 Online Judge 8
579 Beads Categories Codeforces Codeforces Beta Round #8 8
580 Castle Categories Codeforces Codeforces Beta Round #79 (Div. 1 Only) 8
581 Widget Library Categories Codeforces Codeforces Beta Round #74 (Div. 1 Only) & Codeforces Beta Round #74 (Div. 2 Only) 8
582 Yekaterinburg Subway Categories Timus 8
583 K-based Numbers. Version 3 Categories Timus 8
584 Dormitory Categories Codeforces Codeforces Round #155 (Div. 2) 8
585 Nuclear Fusion Categories Codeforces Codeforces Beta Round #65 (Div. 2) 8
586 Password Categories Codeforces Codeforces Beta Round #71 8
587 Sweets Game Categories Codeforces Codeforces Beta Round #59 (Div. 2) 8
588 Brand New Problem Categories Codeforces Codeforces Round #127 (Div. 1) 8
589 What Has Dirichlet Got to Do with That? Categories Codeforces School Team Contest #1 (Winter Computer School 2010/11) 8
590 Writing a Song Categories Codeforces Codeforces Beta Round #50 8
591 Balance Categories Codeforces Codeforces Beta Round #17 8
592 Brackets Categories Codeforces Codeforces Beta Round #92 (Div. 1 Only) & Codeforces Beta Round #92 (Div. 2 Only) 8
593 Linear Kingdom Races Categories Codeforces Codeforces Beta Round #87 (Div. 1 Only) 8
594 Flags Categories Codeforces Codeforces Beta Round #76 (Div. 1 Only) 9
595 Pairs Categories Codeforces Yandex.Algorithm Open 2011 Qualification 1 9
596 Domino Carpet Categories Codeforces Codeforces Beta Round #69 (Div. 1 Only) 9
597 Ivan the Fool VS Gorynych the Dragon Categories Codeforces School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) 9
598 Half-decay tree Categories Codeforces Codeforces Beta Round #62 9
599 Hyper String Categories Codeforces Croc Champ 2012 - Round 2 9
600 Garden Categories Codeforces Codeforces Round #108 (Div. 2) 9
601 Shoe Store Categories Codeforces Codeforces Round #113 (Div. 2) 9
602 T-shirt Categories Codeforces Croc Champ 2012 - Final 9
603 New Year Garland Categories Codeforces Codeforces Round #100 9
604 Liars and Serge Categories Codeforces Codeforces Round #156 (Div. 1) 9
605 Somali Pirates Categories Timus 9
606 Little Elephant and Triangle Categories Codeforces Codeforces Round #136 (Div. 1) 9
607 Cowboys Categories Codeforces VK Cup 2012 Finals (unofficial online-version) 9
608 Triangles Categories Codeforces Codeforces Beta Round #15 9
609 Plane of Tanks: Duel Categories Codeforces Codeforces Round #115 9
610 Journey Categories Codeforces Codeforces Beta Round #53 9
611 Information Reform Categories Codeforces Codeforces Beta Round #64 9
612 Power Defence Categories Codeforces Codeforces Round #115 9
613 Faryuks Categories Timus 9
614 Moon Craters Categories Codeforces School Team Contest #1 (Winter Computer School 2010/11) 9
615 Lesson Timetable Categories Codeforces Codeforces Beta Round #37 9
616 Unambiguous Arithmetic Expression Categories Codeforces Codeforces Beta Round #87 (Div. 1 Only) 9
617 World of Darkraft Categories Codeforces Codeforces Beta Round #99 (Div. 1) 9
618 Arrangement Categories Codeforces Codeforces Beta Round #83 (Div. 1 Only) & Codeforces Beta Round #83 (Div. 2 Only) 9
619 Hanger Categories Codeforces Codeforces Beta Round #68 9
620 Number Challenge Categories Codeforces Codeforces Round #146 (Div. 1) 9
621 Two Subsequences Categories Codeforces Codeforces Beta Round #72 (Div. 1 Only) 9
622 Donkey and Stars Categories Codeforces Codeforces Round #152 (Div. 1) 9
623 Horse Races Categories Codeforces Codeforces Beta Round #77 (Div. 1 Only) & Codeforces Beta Round #77 (Div. 2 Only) 9
624 Formurosa Categories Codeforces Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2) 9
625 Caterpillar Categories Codeforces Codeforces Beta Round #48 9
626 Candy Store Categories Live Archive 2012 North America - Southeast USA 9
627 Mission Impassable Categories Codeforces Codeforces Round #107 (Div. 1) 9
628 StackingBoxes Categories TopCoder SRM 261 - Div1 hard] (7995) 9
629 Crime Management Categories Codeforces Codeforces Beta Round #83 (Div. 1 Only) 9
630 Candies and Stones Categories Codeforces Codeforces Beta Round #79 (Div. 1 Only) 9
631 Mrs. Hudson's Pancakes Categories Codeforces Codeforces Round #110 (Div. 1) 10
632 Mutation Categories Codeforces All-Ukrainian School Olympiad in Informatics 10
633 Meeting Her Categories Codeforces Codeforces Round #148 (Div. 1) 10
634 Tree and Table Categories Codeforces Codeforces Round #153 (Div. 1) 10
635 Help Shrek and Donkey Categories Codeforces Codeforces Beta Round #78 (Div. 1 Only) 10
636 The Great Marathon Categories Codeforces School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) 10
637 Clever Fat Rat Categories Codeforces Codeforces Round #118 (Div. 1) & Codeforces Round #118 (Div. 2) 10
638 Steaks on Board Categories Timus 10
639 Cubes Categories Codeforces Codeforces Round #150 (Div. 1) 10
640 Doe Graphs Categories Codeforces Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2) 10
641 Piglet's Birthday Categories Codeforces Codeforces Round #152 (Div. 2) & Codeforces Round #152 (Div. 1) 10
642 World Evil Categories Codeforces Codeforces Beta Round #58 10
643 Quick Tortoise Categories Codeforces Codeforces Round #144 (Div. 1) 10
644 Expression Categories Codeforces Codeforces Beta Round #54 (Div. 2) 10
645 Dynamic Assignment Problem Categories SPOJ 10
646 Hellish Constraints Categories Codeforces Codeforces Beta Round #99 (Div. 1) 10