便乗。
（□正答っぽいがジャッジしてない，△＝方針が嘘っぽい，怪＝方針は合っているはずだがバグ取れない，－＝未着手,思＝実装してない)
2007
| 問題名 | 状態 | 記事 |
|---|
| Score | □ | |
| Factorial | □ | |
| Mall | □ | |
| Building | □ | |
| Fermat | □ | |
| Salt | － | |
| Anagram | □ | |
| Route | □ | |
| Circuit | △ | |
| Fiber | □ | |
| Lines | 怪 | |
| Packing | － | |
2008
| 問題名 | 状態 | 記事 |
|---|
| Committee | □ | |
| Sheet | □ | |
| Flu | □ | |
| Nile.com | □ | |
| Cheating | □ | |
| Belt | － |
| Origami | □ | |
| Fraction | □ | |
| Nightman | 思 | |
| Ruins | 後 | |
| Typhoon | □ | |
| Election | 後 | |
2009
| 問題名 | 状態 | 記事 |
|---|
| Sequence | | |
| Stamps | | |
| Pyramid | | |
| Abduction | | |
| Advertisement | | |
| Contest | | |
| Territory | | |
| Ski | | |
| Logo | | |
| Distribution | | |
| Chopsticks | | |
| Starry Sky | □ | |
2010
| 問題名 | 状態 | 記事 |
|---|
| JOI Poster | □ | |
| Sengoku | △ | |
| Stairs | □ | |
| a + b problem | □ | |
| DNA synthesizer | □ | |
| Regions | | |
| Finals | □ | |
| Hide-and-seek | □ | |
| SimRoad | | |
| Contest | | |
| Highway | □ | |
| Lake | □ | |
| Plugs | | |
2011
| 問題名 | 状態 | 記事 |
|---|
| Banner | | |
| Dragon | | |
| Joitter | | |
| Guess Them All | | |
| Keycards | | |
| Shiritori | | |
| Deciphering | | |
| Report | | |
| UFO | | |
| Apples | | |
| Bookshelf | | |
| IOI | | |
| Orienteering | | |
