Problems
| Problem | Category | Points | AC % | Users |
|---|---|---|---|---|
| UP12 | C1 | 10 | 35.3% | 30 |
| UP13 | C1 | 20 | 63.0% | 33 |
| UP14 | Practice | 20 | 43.4% | 21 |
| 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 | 16.7% | 6 |
| 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 |
| VTREE1 | Practice | 20 | 58.3% | 4 |
| WAGAR | Practice | 20 | 21.2% | 19 |
| WAITBUS | CNP | 10 | 38.0% | 28 |
| WALK | FLOW | 100 | 0.0% | 0 |
| WALKING | QHD | 100 | 19.0% | 12 |
| WARCHERY | SOHOC | 11 | 47.9% | 45 |
| WATCH | Practice | 100 | 33.3% | 8 |
| WATER | QHDTT | 100 | 36.0% | 30 |
| WATERFILL | Practice | 100 | 27.8% | 40 |
| WATERING | Practice | 100 | 19.0% | 42 |
| WATERT | Practice | 20 | 0.0% | 0 |
| WATERTREE | Practice | 20 | 10.3% | 6 |
| WBANANA | SOHOC | 10 | 40.0% | 49 |
| WBEAUTY | Practice | 10 | 35.7% | 40 |
| WBINARY | Practice | 20 | 35.3% | 6 |
| WBOOTS | Practice | 12 | 28.9% | 11 |
| WBPICKING | Practice | 11 | 14.3% | 1 |
| WBPSUB | QHD | 40 | 25.0% | 9 |
| WBRACKET | DQCN | 100 | 25.3% | 17 |
| WBRACKET2 | DQCN | 100 | 61.5% | 15 |