Problems
| Problem | Category | Points | AC % | Users |
|---|---|---|---|---|
| UNION | Practice | 100 | 17.7% | 24 |
| UNNUM | Practice | 60 | 25.0% | 24 |
| UOCK | Practice | 24 | 28.7% | 47 |
| UP01 | Practice | 50 | 75.6% | 22 |
| UP02 | Practice | 20 | 39.3% | 23 |
| UP03 | Practice | 20 | 9.1% | 1 |
| UP04 | Practice | 10 | 72.2% | 22 |
| UP05 | Practice | 20 | 42.5% | 45 |
| UP06 | Practice | 20 | 51.3% | 36 |
| UP07 | Practice | 10 | 57.1% | 6 |
| UP08 | Practice | 10 | 37.5% | 7 |
| UP09 | Practice | 10 | 37.5% | 3 |
| UP10 | Practice | 20 | 16.7% | 9 |
| UP11 | Practice | 20 | 57.1% | 12 |
| UP12 | C1 | 10 | 33.3% | 30 |
| UP13 | C1 | 20 | 53.1% | 33 |
| UP14 | Practice | 20 | 41.8% | 21 |
| UP15 | A1 | 10 | 91.7% | 11 |
| UP16 | A1 | 20 | 20.0% | 1 |
| UP17 | A1 | 20 | 0.0% | 0 |
| UP18 | A1 | 30 | 35.0% | 11 |
| UP19 | SOHOC | 20 | 36.4% | 47 |
| UP20 | A1 | 20 | 66.7% | 4 |
| UPDTREE | QHD trên cây | 100 | 42.9% | 7 |
| UPGRADESEQ | CTDL | 10 | 23.9% | 19 |
| USCOW | Practice | 12 | 29.7% | 45 |
| USCOW1 | Practice | 10 | 34.0% | 44 |
| UTRISUM | CTDL | 15 | 12.9% | 7 |
| VALUEA | Practice | 100 | 21.9% | 30 |
| VANTCANDY1 | Practice | 45 | 25.8% | 4 |
| VBOOKSHOP | QHD | 15 | 53.5% | 21 |
| VINGAME | DFS | 45 | 17.6% | 9 |
| VIRUS | Practice | 20 | 81.8% | 9 |
| VLIS1 | Practice | 15 | 31.6% | 5 |
| VLN | DH | 100 | 28.4% | 45 |
| VMAXSUM | Practice | 20 | 12.5% | 3 |
| VNGHICHTHE1 | Practice | 30 | 2.4% | 1 |
| VOICE | Practice | 100 | 66.0% | 27 |
| VOLLEYBALL | Practice | 100 | 50.0% | 31 |
| VOTREE | Practice | 20 | 41.9% | 12 |
| VPATH1 | Practice | 20 | 13.4% | 10 |
| VPBRACKET | Practice | 15 | 43.8% | 13 |
| VPBUS | IT | 15 | 24.6% | 14 |
| VPKQUERY | IT | 16 | 41.9% | 20 |
| VPMAXSUBARR | IT | 10 | 48.4% | 13 |
| VPPALIPALI | Practice | 16 | 0.0% | 0 |
| VPMAXSUMSUB | IT | 25 | 23.4% | 13 |
| VRANGE1 | Practice | 20 | 2.2% | 3 |
| VSTAR | Practice | 50 | 0.0% | 0 |
| VTRAVEL | Practice | 50 | 0.0% | 0 |