A2OJ Ladders
This ladder provides a structured path for users with a Codeforces Rating between 1400 to 1499. 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 1400–1499, A2OJ Ladder.
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0/51
Easy
0/48
Medium
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Hard
| Status | Problem | Solve | Practice | Revision | Level | |
|---|---|---|---|---|---|---|
| 1. | Choosing Teams |  | Easy | |||
| 2. | Nearly Lucky Number | | Easy | |||
| 3. | Amusing Joke | | Easy | |||
| 4. | Drinks | | Easy | |||
| 5. | Way Too Long Words | | Easy | |||
| 6. | Presents | | Easy | |||
| 7. | Lunch Rush | | Easy | |||
| 8. | Soft Drinking | | Easy | |||
| 9. | Boy or Girl | | Easy | |||
| 10. | Dividing Orange | | Easy | |||
| 11. | Queue at the School | | Easy | |||
| 12. | HQ9+ | | Easy | |||
| 13. | I_love_\%username\% | | Easy | |||
| 14. | Cakeminator | | Easy | |||
| 15. | Word | | Easy | |||
| 16. | Stones on the Table | | Easy | |||
| 17. | Beautiful Year | | Easy | |||
| 18. | Team | | Easy | |||
| 19. | Insomnia cure | | Easy | |||
| 20. | Vanya and Cards | | Easy | |||
| 21. | Tram | | Easy | |||
| 22. | Petya and Strings | | Easy | |||
| 23. | Array | | Easy | |||
| 24. | Little Elephant and Chess | | Easy | |||
| 25. | Dubstep | | Easy | |||
| 26. | Permutation | | Easy | |||
| 27. | Magic Numbers | | Easy | |||
| 28. | Heads or Tails | | Easy | |||
| 29. | Present from Lena | | Easy | |||
| 30. | Marks | | Easy | |||
| 31. | Xenia and Ringroad | | Easy | |||
| 32. | Lucky Division | | Easy | |||
| 33. | Twins | | Easy | |||
| 34. | Translation | | Easy | |||
| 35. | Chat room | | Easy | |||
| 36. | Football | | Easy | |||
| 37. | Ilya and Bank Account | | Easy | |||
| 38. | Parallelepiped | | Easy | |||
| 39. | String Task | | Easy | |||
| 40. | k-String | | Easy | |||
| 41. | Dragons | | Easy | |||
| 42. | Puzzles | | Easy | |||
| 43. | Playing Cubes | | Medium | |||
| 44. | Two Bags of Potatoes | | Medium | |||
| 45. | Big Segment | | Easy | |||
| 46. | Pashmak and Flowers | | Medium | |||
| 47. | Building Permutation | | Medium | |||
| 48. | Boys and Girls | | Easy | |||
| 49. | Cinema Line | | Easy | |||
| 50. | Rank List | | Easy | |||
| 51. | Points on Line | | Medium | |||
| 52. | Little Girl and Game | | Medium | |||
| 53. | Little Pony and Expected Maximum | | Medium | |||
| 54. | Cosmic Tables | | Medium | |||
| 55. | Lucky Sum of Digits | | Easy | |||
| 56. | Ice Skating | | Medium | |||
| 57. | Sereja and Suffixes | | Easy | |||
| 58. | Free Cash | | Easy | |||
| 59. | Mashmokh and ACM | | Medium | |||
| 60. | Domino | | Medium | |||
| 61. | Hungry Sequence | | Medium | |||
| 62. | Ilya and Queries | | Easy | |||
| 63. | Fence | | Easy | |||
| 64. | T-primes | | Medium | |||
| 65. | Flipping Game | | Medium | |||
| 66. | Cut Ribbon | | Medium | |||
| 67. | Counting Kangaroos is Fun | | Medium | |||
| 68. | Median | | Medium | |||
| 69. | Ciel and Flowers | | Medium | |||
| 70. | Vanya and Exams | | Medium | |||
| 71. | Fixing Typos | | Medium | |||
| 72. | LCM Challenge | | Medium | |||
| 73. | Caesar's Legions | | Medium | |||
| 74. | Xenia and Bit Operations | | Medium | |||
| 75. | Little Girl and Maximum Sum | | Medium | |||
| 76. | Palindrome Transformation | | Medium | |||
| 77. | Array | | Medium | |||
| 78. | Factory | | Medium | |||
| 79. | Ping-Pong (Easy Version) | | Medium | |||
| 80. | Routine Problem | | Medium | |||
| 81. | Tourist Problem | | Medium | |||
| 82. | Color Stripe | | Medium | |||
| 83. | Maze | | Medium | |||
| 84. | Valera and Tubes | | Medium | |||
| 85. | Polo the Penguin and Matrix | | Medium | |||
| 86. | Boredom | | Medium | |||
| 87. | Funky Numbers | | Medium | |||
| 88. | George and Job | | Medium | |||
| 89. | Xenia and Weights | | Medium | |||
| 90. | Physics Practical | | Medium | |||
| 91. | Little Pony and Sort by Shift | | Medium | |||
| 92. | Bombs | | Medium | |||
| 93. | Number of Ways | | Medium | |||
| 94. | Team | | Medium | |||
| 95. | Another Problem on Strings | | Medium | |||
| 96. | Color the Fence | | Medium | |||
| 97. | Tetrahedron | | Medium | |||
| 98. | k-Tree | | Medium | |||
| 99. | Vasya and Basketball | | Medium | |||
| 100. | Gargari and Bishops | | 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 1400–1499, 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 1400-1499 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.