| No. | Problem | Source | Solved | Attempts | Accuracy |
|---|---|---|---|---|---|
| 힙(Heap) 1 problems | |||||
 | 힙정렬2 (Heap_Sort) Special judge | jungol | 2693 | 5672 | 47.48% |
| 이진 탐색 트리(STL set) 5 problems | |||||
 | Tutorial: STL Set 1 | ohjtgood | 211 | 292 | 72.26% |
 | Tutorial : STL Multiset | 31 | 41 | 75.61% | |
 | Tutorial: STL Set 2 | ohjtgood | 157 | 338 | 46.45% |
 | Tutorial: STL Set 3 | ohjtgood | 127 | 388 | 32.73% |
 | Tutorial: STL Set 4 | ohjtgood | 136 | 320 | 42.50% |
| 연습문제 5 problems | |||||
 | 중앙값 | 2842 | 6238 | 45.56% | |
 | 쇼핑몰 | KOI 1차 2019 고1 | 1373 | 4276 | 32.11% |
| | 실시간 투표현황 | klee | 90 | 241 | 37.34% |
| | 명당 Subtask | klee | 108 | 320 | 33.75% |
 | Ugly Numbers | New Zealand 1990 Division I,UVA 136 Ugly Numbers, poj 1338 | 1675 | 4214 | 39.75% |
| 기타 문법 1 problems | |||||
| | Tutorial : unique | klee | 15 | 22 | 68.18% |