General
Introductory Problems
- Weird Algorithm16313 / 16998
- Missing Number13611 / 14536
- Repetitions12036 / 12745
- Increasing Array11096 / 11611
- Permutations9865 / 10227
- Number Spiral6823 / 7471
- Two Knights5112 / 5305
- Two Sets5433 / 5884
- Bit Strings6523 / 6889
- Trailing Zeros6177 / 6585
- Coin Piles5371 / 5956
- Palindrome Reorder4704 / 5082
- Creating Strings I4512 / 4639
- Apple Division3928 / 4588
- Chessboard and Queens2314 / 2357
- Grid Paths1004 / 1316
Sorting and Searching
- Distinct Numbers6563 / 6786
- Apartments4384 / 5153
- Ferris Wheel4232 / 4731
- Concert Tickets3230 / 4069
- Restaurant Customers3337 / 3667
- Movie Festival3180 / 3382
- Sum of Two Values3732 / 4083
- Maximum Subarray Sum3739 / 3881
- Stick Lengths3451 / 3618
- Playlist2975 / 3486
- Towers2872 / 3126
- Traffic Lights2108 / 2401
- Room Allocation1785 / 2169
- Factory Machines1987 / 2186
- Tasks and Deadlines1948 / 1982
- Reading Books1764 / 1904
- Sum of Three Values2099 / 2365
- Sum of Four Values1658 / 1794
- Nearest Smaller Values1943 / 2050
- Subarray Sums I2291 / 2388
- Subarray Sums II1939 / 2181
- Subarray Divisibility1863 / 1984
- Array Division1589 / 1686
- Sliding Median1310 / 1553
- Sliding Cost934 / 1067
- Movie Festival II898 / 1114
- Maximum Subarray Sum II963 / 1163
Dynamic Programming
- Dice Combinations5432 / 5746
- Minimizing Coins4748 / 5055
- Coin Combinations I4329 / 4627
- Coin Combinations II3505 / 4049
- Removing Digits4137 / 4215
- Grid Paths3687 / 3853
- Book Shop3371 / 3748
- Array Description2253 / 2520
- Edit Distance2564 / 2720
- Rectangle Cutting2262 / 2489
- Money Sums2574 / 2668
- Removal Game1984 / 2132
- Two Sets II2051 / 2257
- Increasing Subsequence2240 / 2552
- Projects1413 / 1645
Graph Algorithms
- Counting Rooms3695 / 3911
- Labyrinth2237 / 2837
- Building Roads2862 / 2959
- Message Route2487 / 2607
- Building Teams2412 / 2525
- Round Trip1868 / 2086
- Monsters1056 / 1356
- Shortest Routes I1853 / 2127
- Shortest Routes II1679 / 1812
- High Score905 / 1334
- Flight Discount1126 / 1365
- Cycle Finding919 / 1119
- Flight Routes772 / 857
- Round Trip II942 / 1057
- Course Schedule1155 / 1209
- Longest Flight Route880 / 1030
- Game Routes919 / 971
- Investigation637 / 704
- Planets Queries I663 / 716
- Planets Queries II329 / 403
- Planets Cycles395 / 434
- Road Reparation757 / 780
- Road Construction697 / 710
- Flight Routes Check608 / 671
- Planets and Kingdoms604 / 623
- Giant Pizza356 / 374
- Coin Collector415 / 462
- Mail Delivery368 / 424
- De Bruijn Sequence277 / 289
- Teleporters Path309 / 350
- Hamiltonian Flights310 / 369
- Knight's Tour271 / 302
- Download Speed328 / 348
- Police Chase273 / 292
- School Dance295 / 310
- Distinct Routes230 / 294
Range Queries
- Range Sum Queries I2493 / 2603
- Range Minimum Queries I1956 / 2077
- Range Sum Queries II1934 / 2019
- Range Minimum Queries II1707 / 1750
- Range Xor Queries1770 / 1797
- Range Update Queries1352 / 1453
- Forest Queries1145 / 1173
- Hotel Queries1032 / 1129
- List Removals870 / 927
- Salary Queries725 / 854
- Subarray Sum Queries613 / 714
- Distinct Values Queries604 / 727
- Forest Queries II492 / 522
- Range Updates and Sums438 / 530
- Polynomial Queries365 / 420
- Range Queries and Copies232 / 243
Tree Algorithms
- Subordinates1852 / 1938
- Tree Matching995 / 1209
- Tree Diameter1556 / 1636
- Tree Distances I1076 / 1192
- Tree Distances II875 / 913
- Company Queries I917 / 972
- Company Queries II866 / 908
- Distance Queries878 / 931
- Counting Paths604 / 642
- Subtree Queries689 / 725
- Path Queries563 / 593
- Distinct Colors563 / 633
Mathematics
- Exponentiation2440 / 2715
- Exponentiation II1663 / 2123
- Counting Divisors1746 / 2062
- Common Divisors1243 / 1446
- Sum of Divisors704 / 1164
- Binomial Coefficients1004 / 1160
- Creating Strings II844 / 929
- Distributing Apples792 / 855
- Christmas Party683 / 737
- Fibonacci Numbers858 / 1087
- Throwing Dice553 / 601
- Graph Paths I448 / 487
- Graph Paths II356 / 374
- Dice Probability435 / 467
- Moving Robots233 / 254
- Candy Lottery321 / 330
- Inversion Probability296 / 302
- Stick Game427 / 438
- Nim Game I531 / 553
- Nim Game II439 / 457
- Stair Game278 / 334
String Algorithms
- Word Combinations330 / 567
- String Matching687 / 944
- Finding Borders486 / 575
- Finding Periods312 / 381
- Minimal Rotation277 / 394
- Longest Palindrome337 / 449
- Required Substring171 / 300
Additional Problems
- Shortest Subsequence477 / 638
- Counting Bits518 / 643
- Swap Game170 / 238
- Meet in the Middle313 / 395
- Prüfer Code201 / 212
- Edge Directions270 / 287
- Advertisement341 / 363
- Elevator Rides176 / 237
- Maximum Xor Subarray239 / 259
- Movie Festival Queries115 / 133
- Chess Tournament138 / 163
- Tree Traversals143 / 147
- Network Renovation110 / 169
- Graph Girth160 / 179
- Intersection Points135 / 145
- String Reorder98 / 108
- Pyramid Array88 / 112
- Increasing Subsequence II194 / 207
- String Removals159 / 165
- Bit Inversions196 / 213
- Writing Numbers155 / 170
- String Transform87 / 111
- Maximum Building I203 / 209
- Sorting Methods136 / 146
- Cyclic Array85 / 122
- Food Division81 / 98
- Bit Problem101 / 111
- Swap Round Sorting58 / 76
- Tree Isomorphism I112 / 141
- Critical Cities52 / 80
- School Excursion112 / 124
- Coin Grid70 / 88
- Robot Path42 / 82
- Course Schedule II90 / 150
- Empty String106 / 141
- Grid Paths124 / 152
- Book Shop II122 / 140
- Network Breakdown109 / 112
- Visiting Cities103 / 141
- Number Grid158 / 198
- Maximum Building II67 / 81
- Stick Divisions186 / 226
- Coding Company71 / 88
- Flight Route Requests74 / 79
- Tree Isomorphism II88 / 107
- Forbidden Cities68 / 84
- Area of Rectangles97 / 113
- Creating Offices51 / 72
- Permutations II146 / 161
- New Flight Routes48 / 110