A2OJ Ladders
This ladder provides a structured path for users with a Codeforces Rating between 2000 to 2099. It has different levels of difficulty, helping them to systematically improve their problem-solving skills. A2OJ ladders have proven to be beneficial for many competitive programmers over the years.
Also known as ACD Ladder 2000–2099, A2OJ Ladder.
0%
0/100
Overall progress
0 / 100
0/5
Easy
0/13
Medium
0/82
Hard
| Status | Problem | Solve | Practice | Revision | Level | |
|---|---|---|---|---|---|---|
| 1. | Fox And Snake |  | Easy | |||
| 2. | Pangram | | Easy | |||
| 3. | Vanya and Cubes | | Easy | |||
| 4. | Minimum Difficulty | | Easy | |||
| 5. | Dreamoon and WiFi | | Medium | |||
| 6. | Giga Tower | | Easy | |||
| 7. | Vanya and Lanterns | | Medium | |||
| 8. | Two Buttons | | Medium | |||
| 9. | Good Sequences | | Medium | |||
| 10. | Long Path | | Medium | |||
| 11. | Maximum Submatrix 2 | | Medium | |||
| 12. | Glass Carving | | Medium | |||
| 13. | Factory | | Medium | |||
| 14. | Mr. Kitayuta, the Treasure Hunter | | Hard | |||
| 15. | Number of Ways | | Medium | |||
| 16. | Vanya and Exams | | Medium | |||
| 17. | Clique Problem | | Hard | |||
| 18. | Triangle | | Medium | |||
| 19. | DZY Loves Sequences | | Medium | |||
| 20. | Boredom | | Medium | |||
| 21. | Fox and Card Game | | Hard | |||
| 22. | Fox and Minimal path | | Hard | |||
| 23. | Drazil and Tiles | | Hard | |||
| 24. | Vanya and Field | | Hard | |||
| 25. | Watching Fireworks is Fun | | Hard | |||
| 26. | Sereja and Table | | Hard | |||
| 27. | Ciel and Duel | | Hard | |||
| 28. | Three States | | Hard | |||
| 29. | Little Pony and Harmony Chest | | Hard | |||
| 30. | Increase Sequence | | Hard | |||
| 31. | Pashmak and Parmida's problem | | Hard | |||
| 32. | Levko and Array | | Hard | |||
| 33. | Vanya and Computer Game | | Hard | |||
| 34. | Appleman and a Sheet of Paper | | Hard | |||
| 35. | Jeff and Permutation | | Hard | |||
| 36. | Ciel the Commander | | Hard | |||
| 37. | Pair of Numbers | | Hard | |||
| 38. | Wonder Room | | Hard | |||
| 39. | Upgrading Array | | Hard | |||
| 40. | Pashmak and Graph | | Hard | |||
| 41. | DZY Loves Modification | | Hard | |||
| 42. | Water Tree | | Hard | |||
| 43. | Appleman and Tree | | Hard | |||
| 44. | Gerald and Giant Chess | | Hard | |||
| 45. | Array and Operations | | Hard | |||
| 46. | Restore Cube | | Hard | |||
| 47. | Lucky Subsequence | | Hard | |||
| 48. | Little Elephant and Array | | Hard | |||
| 49. | Strip | | Hard | |||
| 50. | Sereja and Brackets | | Hard | |||
| 51. | Mashmokh and Reverse Operation | | Hard | |||
| 52. | Prefixes and Suffixes | | Hard | |||
| 53. | Propagating tree | | Hard | |||
| 54. | Two Sets | | Hard | |||
| 55. | Civilization | | Hard | |||
| 56. | Little Pony and Summer Sun Celebration | | Hard | |||
| 57. | Watto and Mechanism | | Hard | |||
| 58. | Substitutes in Number | | Hard | |||
| 59. | A Lot of Games | | Hard | |||
| 60. | Jzzhu and Cities | | Hard | |||
| 61. | Caisa and Tree | | Hard | |||
| 62. | Hill Climbing | | Hard | |||
| 63. | Mr. Kitayuta's Colorful Graph | | Hard | |||
| 64. | Double Profiles | | Hard | |||
| 65. | Number Transformation II | | Hard | |||
| 66. | Darth Vader and Tree | | Hard | |||
| 67. | Divisors | | Hard | |||
| 68. | Captains Mode | | Hard | |||
| 69. | Mike and Frog | | Hard | |||
| 70. | Sereja and Two Sequences | | Hard | |||
| 71. | A Simple Task | | Hard | |||
| 72. | Devu and Birthday Celebration | | Hard | |||
| 73. | Sereja and Squares | | Hard | |||
| 74. | Traffic Jams in the Land | | Hard | |||
| 75. | Match & Catch | | Hard | |||
| 76. | DZY Loves FFT | | Hard | |||
| 77. | The Child and Sequence | | Hard | |||
| 78. | Vasya and Beautiful Arrays | | Hard | |||
| 79. | Beautiful Pairs of Numbers | | Hard | |||
| 80. | Tricky Function | | Hard | |||
| 81. | Antimatter | | Hard | |||
| 82. | DZY Loves Colors | | Hard | |||
| 83. | Information Graph | | Hard | |||
| 84. | Jzzhu and Numbers | | Hard | |||
| 85. | Little Elephant and Inversions | | Hard | |||
| 86. | Subset Sums | | Hard | |||
| 87. | Arthur and Walls | | Hard | |||
| 88. | Mashmokh and Water Tanks | | Hard | |||
| 89. | Square Tiling | | Hard | |||
| 90. | Alex and Complicated Task | | Hard | |||
| 91. | Fedor and Essay | | Hard | |||
| 92. | Case of a Top Secret | | Hard | |||
| 93. | Xenia and Tree | | Hard | |||
| 94. | Kindergarten | | Hard | |||
| 95. | Artem and Array | | Hard | |||
| 96. | Jzzhu and Apples | | Hard | |||
| 97. | DZY Loves Fibonacci Numbers | | Hard | |||
| 98. | Polo the Penguin and Trees | | Hard | |||
| 99. | Sign on Fence | | Hard | |||
| 100. | Serega and Fun | | Hard |
There is no PDF here, and you do not need one. All 100 problems are listed in full on this page, free and without an account — and unlike a PDF the list remembers what you have ticked off, so you are not re-reading a static file to work out where you stopped. Use your browser's print view if you want it on paper.
Yes — same sheet, different name. It is also known as ACD Ladder 2000–2099, A2OJ Ladder. Whichever name you searched for, this is the tracker for it.
Tick a problem on this page and it stays ticked. Progress saves in your browser straight away with no account, and the counts update per section so you can see which parts of 2000-2099 A2OJ: Ladder you have actually covered. Signing in with Google syncs it across devices.
At roughly 25 minutes a problem — reading it, solving it and writing the approach down — 100 problems is about 42 hours, or 4 weeks at ten hours a week. Treat that as a planning figure rather than a promise; the first pass through an unfamiliar topic is always slower.
Yes, completely, and no account is needed. There is no paid tier and nothing is held back — the sheet itself is by A2OJ Ladders, and this is a free tracker for it.
Finish one. Sheets overlap heavily, so working several in parallel mostly means re-solving the same problems while never completing a full topic sweep. If you are not sure this is the right one for the time you have, the sheet comparison page puts the options side by side with hour estimates.