9 problems
| ID | Problem | Difficulty | Accepted | Solved | Status |
|---|---|---|---|---|---|
| 207 | DOM Treedomtree | Silver II | 44% | 7 | Not tried |
| 226 | 숨겨진 수hiddennumber | Bronze I | 100% | 14 | Not tried |
| 478 | 신에게 부탁한 턴과 리버godturnriver | Unrated | 100% | 1 | Not tried |
| 479 | 신의 가호를 받은 블랙잭blessedblackjack | Unrated | 50% | 1 | Not tried |
| 480 | 인터네셔널 OJinternationaloj | Gold I | 25% | 1 | Not tried |
| 481 | 이상한 십진법 XORdecimalxorhard | Platinum II | 67% | 2 | Not tried |
| 576 | 보안 취약점 패치securitypatch | Unrated | 100% | 1 | Not tried |
| 621 | 암호 추정cipherguess | Gold V | 56% | 81 | Not tried |
| 650 | 교환과 행렬곱matrixswap | Unrated | 100% | 1 | Not tried |
