| Magical Tiered Cake | 2000 | Solve |
| Mahmoud and Ehab and the binary string | 2000 | Solve |
| Mahmoud and a Dictionary | 2000 | Solve |
| Make Them Equal | 2000 | Solve |
| Maple and Tree Beauty (Hard Version) | 2000 | Solve |
| Mars rover | 2000 | Solve |
| Martian Luck | 2000 | Solve |
| Masha-forgetful | 2000 | Solve |
| Match Points | 2000 | Solve |
| Matching vs Independent Set | 2000 | Solve |
| Max Sum OR (Hard Version) | 2000 | Solve |
| Maxim and Array | 2000 | Solve |
| Maxim and Matrix | 2000 | Solve |
| Maximize the Remaining String | 2000 | Solve |
| Maximum Balanced Circle | 2000 | Solve |
| Maximum Subarray | 2000 | Solve |
| Merging Two Decks | 2000 | Solve |
| Messages | 2000 | Solve |
| Messenger Simulator | 2000 | Solve |
| Microtransactions (easy version) | 2000 | Solve |
| Microtransactions (hard version) | 2000 | Solve |
| Mike and Geometry Problem | 2000 | Solve |
| Minimal Diameter Forest | 2000 | Solve |