| 5919 | BZOJ1919：[Ctsc2010]性能优化 | 0 | 0 | 0.000% |
| 6919 | BZOJ2919：[Poi1998]Word equations | 0 | 0 | 0.000% |
| 7919 | BZOJ3919：[Baltic2014]portals | 0 | 0 | 0.000% |
| 8919 | BZOJ 4919 | 0 | 0 | 0.000% |
| 304824 | CF919A. Supermarket | 0 | 0 | 0.000% |
| 304825 | CF919B. Perfect Number | 0 | 0 | 0.000% |
| 304826 | CF919C. Seat Arrangements | 0 | 0 | 0.000% |
| 304827 | CF919D. Substring | 0 | 0 | 0.000% |
| 304828 | CF919E. Congruence Equation | 0 | 0 | 0.000% |
| 304829 | CF919F. A Game With Numbers | 0 | 0 | 0.000% |
| 310996 | CF1919A. Wallet Exchange | 0 | 0 | 0.000% |
| 310997 | CF1919B. Plus-Minus Split | 0 | 0 | 0.000% |
| 310998 | CF1919C. Grouping Increases | 0 | 0 | 0.000% |
| 310999 | CF1919D. 01 Tree | 0 | 0 | 0.000% |
| 311000 | CF1919E. Counting Prefixes | 0 | 0 | 0.000% |
| 311001 | CF1919F1. Wine Factory (Easy Version) | 0 | 0 | 0.000% |
| 311002 | CF1919F2. Wine Factory (Hard Version) | 0 | 0 | 0.000% |
| 311003 | CF1919G. Tree LGM | 0 | 0 | 0.000% |
| 311004 | CF1919H. Tree Diameter | 0 | 0 | 0.000% |
| 311005 | CF1920A. Satisfying Constraints | 0 | 0 | 0.000% |
| 311006 | CF1920B. Summation Game | 0 | 0 | 0.000% |
| 311007 | CF1920C. Partitioning the Array | 0 | 0 | 0.000% |
| 311008 | CF1920D. Array Repetition | 0 | 0 | 0.000% |
| 311009 | CF1920E. Counting Binary Strings | 0 | 0 | 0.000% |
| 311010 | CF1920F1. Smooth Sailing (Easy Version) | 0 | 0 | 0.000% |
| 311011 | CF1920F2. Smooth Sailing (Hard Version) | 0 | 0 | 0.000% |