37 problems
| ID | Problem | Difficulty | Accepted | Solved | Status |
|---|---|---|---|---|---|
| 1 | 레몬 게임lemongame | Silver V | 44% | 127 | Not tried |
| 2 | 레몬 샹들리에coloring | Diamond IV | 46% | 15 | Not tried |
| 12 | 레몬컵 상품 준비하기gift | Diamond V | 48% | 11 | Not tried |
| 13 | 꽃을 밟지 마세요flower | Platinum III | 39% | 11 | Not tried |
| 14 | 열도island | Diamond II | 56% | 4 | Not tried |
| 16 | 참새와 쿼리sparrowquery | Diamond V | 54% | 4 | Not tried |
| 28 | 직사각형 칠하기rectangle | Bronze I | 65% | 40 | Not tried |
| 29 | 가로등streetlights | Silver I | 52% | 24 | Not tried |
| 30 | 격자점 위의 정사각형lattice | Gold II | 50% | 13 | Not tried |
| 33 | 쿠키 분배하기cookies | Gold I | 33% | 20 | Not tried |
| 37 | Yet Another Tree Problemtree | Diamond II | 25% | 5 | Not tried |
| 45 | PSpslove | Bronze I | 74% | 52 | Not tried |
| 46 | Yet Another Tree Problem 2tree | Platinum V | 14% | 6 | Not tried |
| 48 | 순열의 개수permutation | Platinum IV | 50% | 18 | Not tried |
| 62 | 01 10zeroone | Silver I | 53% | 46 | Not tried |
| 74 | 중앙값median | Diamond III | 14% | 12 | Not tried |
| 75 | 지우기deletion | Ruby V | 8% | 3 | Not tried |
| 167 | 레인보우 스패닝 트리rainbowtree | Diamond IV | 100% | 10 | Not tried |
| 206 | 순열sqrt | Unrated | 0% | 2 | Not tried |
| 268 | 공 넣기balls | Gold II | 41% | 14 | Not tried |
| 372 | 배수multiple | Diamond IV | 100% | 5 | Not tried |
| 373 | Shiftshift | Diamond III | 86% | 5 | Not tried |
| 375 | 괄호 게임parentheses_game | Gold III | 82% | 12 | Not tried |
| 418 | 진화evolution | Ruby I | 2% | 1 | Not tried |
| 419 | 회의meetings | Platinum I | 30% | 23 | Not tried |
| 420 | 괄호 나누기split | Diamond IV | 15% | 15 | Not tried |
| 487 | Sum of Adjacent Minimumssum | Platinum V | 40% | 30 | Not tried |
| 488 | Graph Constructiongraph | Platinum III | 36% | 29 | Not tried |
| 489 | Median 2median2 | Diamond II | 8% | 4 | Not tried |
| 490 | Frogsfrogs | Diamond V | 19% | 10 | Not tried |
| 491 | Candiescandies | Diamond III | 13% | 4 | Not tried |
| 492 | Tourtour | Diamond II | 5% | 2 | Not tried |
| 582 | Yet Another Permutation Problem 2permutation2 | Silver III | 73% | 90 | Not tried |
| 588 | 지우기 2deletion2 | Diamond III | 6% | 5 | Not tried |
| 622 | Grid Sortgridsort | Platinum V | 16% | 41 | Not tried |
| 640 | 두 트리twotrees | Platinum III | 17% | 20 | Not tried |
| 643 | 하나 둘 셋 2onetwothree | Ruby IV | 1% | 3 | Not tried |
