General
Introductory Problems
- Weird Algorithm18630 / 19408
- Missing Number15577 / 16607
- Repetitions13762 / 14569
- Increasing Array12731 / 13316
- Permutations11318 / 11733
- Number Spiral7815 / 8546
- Two Knights5835 / 6055
- Two Sets6173 / 6706
- Bit Strings7459 / 7885
- Trailing Zeros7052 / 7518
- Coin Piles6135 / 6803
- Palindrome Reorder5323 / 5776
- Creating Strings I5140 / 5293
- Apple Division4467 / 5234
- Chessboard and Queens2644 / 2695
- Grid Paths1135 / 1490
Sorting and Searching
- Distinct Numbers7537 / 7801
- Apartments5019 / 5902
- Ferris Wheel4842 / 5408
- Concert Tickets3727 / 4667
- Restaurant Customers3829 / 4201
- Movie Festival3644 / 3873
- Sum of Two Values4278 / 4693
- Maximum Subarray Sum4312 / 4471
- Stick Lengths3958 / 4145
- Playlist3424 / 3980
- Towers3310 / 3585
- Traffic Lights2437 / 2797
- Room Allocation2033 / 2482
- Factory Machines2296 / 2509
- Tasks and Deadlines2252 / 2293
- Reading Books2029 / 2182
- Sum of Three Values2414 / 2714
- Sum of Four Values1901 / 2058
- Nearest Smaller Values2230 / 2343
- Subarray Sums I2619 / 2728
- Subarray Sums II2228 / 2491
- Subarray Divisibility2117 / 2257
- Array Division1827 / 1935
- Sliding Median1488 / 1759
- Sliding Cost1054 / 1206
- Movie Festival II1039 / 1291
- Maximum Subarray Sum II1099 / 1329
Dynamic Programming
- Dice Combinations6315 / 6703
- Minimizing Coins5510 / 5880
- Coin Combinations I5048 / 5412
- Coin Combinations II4074 / 4722
- Removing Digits4776 / 4867
- Grid Paths4283 / 4470
- Book Shop3910 / 4337
- Array Description2644 / 2964
- Edit Distance2987 / 3165
- Rectangle Cutting2637 / 2885
- Money Sums3001 / 3115
- Removal Game2259 / 2435
- Two Sets II2381 / 2604
- Increasing Subsequence2581 / 2937
- Projects1643 / 1896
Graph Algorithms
- Counting Rooms4290 / 4552
- Labyrinth2601 / 3284
- Building Roads3332 / 3452
- Message Route2910 / 3043
- Building Teams2819 / 2953
- Round Trip2214 / 2448
- Monsters1251 / 1584
- Shortest Routes I2172 / 2486
- Shortest Routes II1951 / 2114
- High Score1068 / 1537
- Flight Discount1316 / 1582
- Cycle Finding1064 / 1289
- Flight Routes885 / 989
- Round Trip II1116 / 1252
- Course Schedule1384 / 1446
- Longest Flight Route1053 / 1234
- Game Routes1093 / 1156
- Investigation755 / 826
- Planets Queries I768 / 834
- Planets Queries II373 / 456
- Planets Cycles462 / 509
- Road Reparation881 / 908
- Road Construction829 / 848
- Flight Routes Check733 / 804
- Planets and Kingdoms714 / 739
- Giant Pizza416 / 435
- Coin Collector496 / 554
- Mail Delivery436 / 507
- De Bruijn Sequence321 / 337
- Teleporters Path357 / 402
- Hamiltonian Flights351 / 420
- Knight's Tour303 / 339
- Download Speed408 / 431
- Police Chase328 / 352
- School Dance342 / 359
- Distinct Routes267 / 334
Range Queries
- Range Sum Queries I2855 / 2981
- Range Minimum Queries I2253 / 2398
- Range Sum Queries II2225 / 2317
- Range Minimum Queries II1994 / 2048
- Range Xor Queries2046 / 2082
- Range Update Queries1554 / 1670
- Forest Queries1329 / 1365
- Hotel Queries1183 / 1287
- List Removals1009 / 1073
- Salary Queries825 / 977
- Subarray Sum Queries710 / 812
- Distinct Values Queries687 / 822
- Forest Queries II557 / 587
- Range Updates and Sums516 / 618
- Polynomial Queries429 / 491
- Range Queries and Copies279 / 292
Tree Algorithms
- Subordinates2134 / 2237
- Tree Matching1160 / 1415
- Tree Diameter1784 / 1873
- Tree Distances I1230 / 1365
- Tree Distances II1010 / 1050
- Company Queries I1070 / 1137
- Company Queries II1031 / 1082
- Distance Queries1024 / 1085
- Counting Paths683 / 724
- Subtree Queries788 / 832
- Path Queries646 / 678
- Distinct Colors642 / 723
Mathematics
- Exponentiation2770 / 3086
- Exponentiation II1888 / 2412
- Counting Divisors1994 / 2345
- Common Divisors1420 / 1643
- Sum of Divisors783 / 1316
- Binomial Coefficients1121 / 1304
- Creating Strings II949 / 1048
- Distributing Apples881 / 947
- Christmas Party766 / 825
- Fibonacci Numbers967 / 1220
- Throwing Dice610 / 666
- Graph Paths I502 / 544
- Graph Paths II404 / 422
- Dice Probability491 / 531
- Moving Robots262 / 282
- Candy Lottery353 / 363
- Inversion Probability323 / 330
- Stick Game473 / 485
- Nim Game I583 / 606
- Nim Game II484 / 508
- Stair Game313 / 368
String Algorithms
- Word Combinations380 / 642
- String Matching775 / 1060
- Finding Borders541 / 639
- Finding Periods352 / 428
- Minimal Rotation321 / 451
- Longest Palindrome372 / 506
- Required Substring195 / 343
Additional Problems
- Shortest Subsequence530 / 715
- Counting Bits573 / 719
- Swap Game199 / 278
- Meet in the Middle364 / 460
- Prüfer Code231 / 243
- Edge Directions306 / 324
- Advertisement373 / 396
- Elevator Rides208 / 286
- Maximum Xor Subarray276 / 297
- Movie Festival Queries135 / 154
- Chess Tournament157 / 186
- Tree Traversals162 / 166
- Network Renovation123 / 190
- Graph Girth198 / 225
- Intersection Points164 / 175
- String Reorder112 / 124
- Pyramid Array101 / 127
- Increasing Subsequence II223 / 239
- String Removals173 / 179
- Bit Inversions231 / 252
- Writing Numbers165 / 180
- String Transform94 / 118
- Maximum Building I231 / 239
- Sorting Methods154 / 165
- Cyclic Array98 / 137
- Food Division88 / 108
- Bit Problem115 / 126
- Swap Round Sorting67 / 88
- Tree Isomorphism I123 / 155
- Critical Cities57 / 90
- School Excursion135 / 148
- Coin Grid80 / 101
- Robot Path48 / 90
- Course Schedule II110 / 176
- Empty String118 / 152
- Grid Paths132 / 165
- Book Shop II136 / 154
- Network Breakdown128 / 132
- Visiting Cities114 / 153
- Number Grid169 / 214
- Maximum Building II72 / 87
- Stick Divisions215 / 259
- Coding Company79 / 100
- Flight Route Requests81 / 88
- Tree Isomorphism II100 / 119
- Forbidden Cities75 / 92
- Area of Rectangles108 / 124
- Creating Offices53 / 75
- Permutations II156 / 172
- New Flight Routes55 / 122