| Platinum 3문제 expand_more |
| 4141 | Cave Paintings | USACO 2020 January Platinum | 0 | 0 | |
| 4142 | Non-Decreasing Subsequences | USACO 2020 January Platinum | 0 | 0 | |
| 4143 | Falling Portals | USACO 2020 January Platinum | 0 | 0 | |
| Gold 3문제 expand_more |
 4827 | 영업왕 명석이 (Time is Mooney) | USACO 2020 January Gold | 47 | 132 | 35.61% |
| 4145 | Farmer John Solves 3SUM | USACO 2020 January Gold | 0 | 1 | 0.00% |
| 4146 | Springboards | USACO 2020 January Gold | 0 | 0 | |
| Silver 3문제 expand_more |
| 4147 | Berry Picking | USACO 2020 January Silver | 0 | 0 | |
| 4148 | Loan Repayment | USACO 2020 January Silver | 0 | 2 | 0.00% |
| 4149 | Wormhole Sort | USACO 2020 January Silver | 0 | 0 | |
| Bronze 3문제 expand_more |
 4150 | Word Processor auto_awesome 스페셜 저지 translate 다국어 | USACO 2020 January Bronze | 8 | 17 | 47.06% |
 4151 | Photoshoot | USACO 2020 January Bronze | 3 | 9 | 33.33% |
| 4152 | Race | USACO 2020 January Bronze | 1 | 2 | 50.00% |
