| 1. Add to 13 | | Easy 1 | 71% 303 / 424 |
| 2. Put a ring on it. | BasicsData Structures Google | Easy 1 | 57% 495 / 874 |
| 3. It's over for you. (if you can't do this) | | Easy 1.5 | 20% 190 / 968 |
| 4. Know your limits. (Easy version) | NetworkingBasics Akuna Capital +1 | Easy 1.5 | 28% 137 / 482 |
| 5. Know your limits. (Hard version) | NetworkingBasics Akuna Capital +1 | Easy+ 2 | 31% 73 / 234 |
| 6. burn this image into the retina of my eye | Machine LearningBasics Meta | Easy+ 2 | 80% 51 / 64 |
| 7. CorrelationTTV (Easy version) | | Easy+ 2 | 19% 50 / 267 |
| 8. Crafter | | Easy+ 2 | 9% 47 / 515 |
| 9. Unique Pointer 2 Parts | | Easy+ 2.5 | — |
| 10. Pixel Budget | BasicsAlgorithms Anthropic +1 | Easy+ 2.5 | 77% 34 / 44 |
| 11. Ok Garmin, save video | Data StructuresBasics Amazon | Easy+ 2.5 | 53% 49 / 92 |
| 12. Ouroboros | | Easy+ 2.5 | 44% 41 / 94 |
| 13. Down the Rabbit-Hole | BasicsMath Jane Street +1 | Normal 3 | 51% 24 / 47 |
| 14. Vector (Easy version) 2 Parts | Data StructuresBasics Squarepoint | Normal 3 | 10% 29 / 294 |
| 15. Stronger Together | | Normal 3 | 81% 21 / 26 |
| 16. Let's Connect! (Easy version) | BasicsGame Theory Citadel | Normal 3 | 68% 21 / 31 |
| 17. The Answer to the Ultimate Question of Life, the Universe, and Everything | Memory ManagementBasics HRT | Normal 3 | 15% 80 / 542 |
| 18. Hash Map 2 Parts | | Normal 3 | — |
| 19. Deque 2 Parts | Data StructuresMemory Management | Normal 3.5 | — |
| 20. The Endless Expanse Project 1 Part | | Normal 3.5 | 26% 6 / 23 |
| 21. Shared Pointer 2 Parts | | Normal 3.5 | — |
| 22. Time-Windowed Join | BasicsData Structures Google | Normal 3.5 | 59% 17 / 29 |
| 23. The Amazing Race 1 | | Normal 3.5 | 13% 16 / 126 |
| 24. One step forward, two steps back | AlgorithmsMath Anthropic +1 | Normal+ 4 | 86% 6 / 7 |
| 25. Escape the Matrix | Data StructuresMath Voleon +2 | Normal+ 4 | 25% 15 / 61 |
| 26. Omniscient Reader's Viewpoint | | Normal+ 4 | 53% 8 / 15 |
| 27. We live in a simulation. | | Normal+ 4 | 88% 15 / 17 |
| 28. CorrelationTTV (Hard version) | | Normal+ 4 | 8% 12 / 160 |
| 29. You're naive. | | Normal+ 4 | 35% 8 / 23 |
| 30. Return Routing Engine Debug 4 Symptoms | DebuggingSystems Amazon +1 | Normal+ 4.5 | 67% 2 / 3 |
| 31. Hashring | Data StructuresBasics Anthropic | Normal+ 4.5 | 15% 8 / 53 |
| 32. Ordered Map 2 Parts | | Normal+ 4.5 | 100% 1 / 1 |
| 33. Multidimensional Virtual Arcade | Design PatternsGame Theory Citadel +1 | Normal+ 4.5 | 4% 4 / 98 |
| 34. Do you think he clicks? | | Hard 5 | 29% 10 / 35 |
| 35. Knock on wood | ConcurrencyOperating Systems Nvidia +1 | Hard 5 | 16% 13 / 79 |
| 36. We were all SYNners. | | Hard 5 | 26% 10 / 38 |
| 37. One, Two, Skip a few... | Memory ManagementData Structures Optiver | Hard 5 | 36% 17 / 47 |
| 38. Design an in-memory file system | Design PatternsData Structures Meta +1 | Hard 5.5 | 17% 7 / 42 |
| 39. Return by Death | Machine LearningBasics Anthropic +1 | Hard 5.5 | 100% 4 / 4 |
| 40. Pardon my... | Data StructuresMemory Management +1 | Hard 5.5 | 29% 5 / 17 |
| 41. cant erase u | Design PatternsMemory Management | Harder 6 | 9% 5 / 57 |
| 42. Porphyrophobia | Design PatternsNetworking Meta +1 | Harder 6 | 17% 8 / 48 |
| 43. I'm single. | Operating SystemsDesign Patterns Akuna Capital +2 | Harder 6 | 12% 18 / 149 |
| 44. Let's Connect! (Hard version) | | Harder 6 | 8% 7 / 83 |
| 45. The NOexistenceN of you AND me | Design PatternsMachine Learning Millennium +1 | Insane 7 | 100% 5 / 5 |
| 46. Return to Sender | | Insane 7.5 | 21% 6 / 29 |
| 47. Vector (Hard Version) 3 Parts | Memory ManagementData Structures Squarepoint | Insane 7.5 | 4% 6 / 157 |
| 48. Pool party! | Memory ManagementDesign Patterns Akuna Capital +2 | Expert 8 | 7% 7 / 103 |
| 49. Consumerism (Easy version) | Data StructuresConcurrency +2 | Master 9 | 16% 9 / 58 |
| 50. My little tokenizer can't be this greedy?! | Machine LearningData Structures +1 | Master 9 | 33% 2 / 6 |
| 51. Stacked up (Easy Version) | Operating SystemsData Structures +1 | Master 9.5 | 16% 4 / 25 |
| 52. Consumerism (Hard version) | Memory ManagementDesign Patterns +3 | Grandmaster 10 | 30% 9 / 30 |
| 53. Stacked up (Hard Version) | Memory ManagementData Structures +2 | Glitched 11 | 38% 6 / 16 |