| 5904 | BZOJ1904：Musical Water-fence | 0 | 0 | 0.000% |
| 6904 | BZOJ2904：平方和 | 0 | 0 | 0.000% |
| 7904 | BZOJ3904：狼和羊 | 0 | 0 | 0.000% |
| 8904 | BZOJ 4904 | 0 | 0 | 0.000% |
| 304740 | CF904A. Masha and Bears | 0 | 0 | 0.000% |
| 304741 | CF904B. Tic-Tac-Toe | 0 | 0 | 0.000% |
| 304742 | CF904C. Shockers | 0 | 0 | 0.000% |
| 304743 | CF904D. Seating of Students | 0 | 0 | 0.000% |
| 304744 | CF904E. Party | 0 | 0 | 0.000% |
| 304745 | CF904F. Power Tower | 0 | 0 | 0.000% |
| 310769 | CF1884A. Simple Design | 0 | 0 | 0.000% |
| 310770 | CF1884B. Haunted House | 0 | 0 | 0.000% |
| 310771 | CF1884C. Medium Design | 0 | 0 | 0.000% |
| 310772 | CF1884D. Counting Rhyme | 0 | 0 | 0.000% |
| 310773 | CF1884E. Hard Design | 0 | 0 | 0.000% |
| 310879 | CF1904A. Forked! | 0 | 0 | 0.000% |
| 310880 | CF1904B. Collecting Game | 0 | 0 | 0.000% |
| 310881 | CF1904C. Array Game | 0 | 0 | 0.000% |
| 310882 | CF1904D1. Set To Max (Easy Version) | 0 | 0 | 0.000% |
| 310883 | CF1904D2. Set To Max (Hard Version) | 0 | 0 | 0.000% |
| 310884 | CF1904E. Tree Queries | 0 | 0 | 0.000% |
| 310885 | CF1904F. Beautiful Tree | 0 | 0 | 0.000% |