https://testcase.ac/ 1991-트리순회(트리), 5397-키로거(링크드리스트), 9663-N-Queen(재귀), 16300-H2O(파싱) JOI 문제 TC https://gooddaytocode.blogspot.com/2016/12/japanese-olympiad-in-informatics-joi.html
| 레벨 | 문제 | |
|---|---|---|
| Bronze | 876 | 49.4% |
| Silver | 743 | 41.9% |
| Gold | 138 | 7.8% |
| Platinum | 10 | 0.6% |
| Diamond | 2 | 0.1% |
| Ruby | 0 | 0.0% |