| Platinum 3문제 expand_more |
| 5777 | No Time to Dry | USACO 2021 Febuary Platinum | 0 | 0 | |
| 5776 | Minimizing Edges | USACO 2021 Febuary Platinum | 0 | 0 | |
| 5775 | Counting Graphs | USACO 2021 Febuary Platinum | 0 | 0 | |
| Gold 3문제 expand_more |
| 5774 | Stone Game | USACO 2021 Febuary Gold | 0 | 0 | |
| 5773 | Modern Art 3 | USACO 2021 Febuary Gold | 0 | 0 | |
| 5772 | Count the Cows | USACO 2021 Febuary Gold | 0 | 0 | |
| Silver 3문제 expand_more |
 5293 | 편안한 소 | USACO 2021 February Silver | 2 | 5 | 40.00% |
 5294 | 소의 해 | USACO 2021 February Silver | 3 | 6 | 50.00% |
 5295 | 적당히 초록해(Just Green Enough) | USACO 2021 February Silver | 3 | 5 | 60.00% |
| Bronze 3문제 expand_more |
 5361 | 소띠 배씨 (Year of the Cow) | USACO 2021 February Bronze | 17 | 35 | 48.57% |
 5362 | 성장 가능한 포도 (Comfortable Cows) | USACO 2021 February Bronze | 9 | 19 | 47.37% |
 5363 | 시계방향 울타리 (Clockwise Fence) | USACO 2021 February Bronze | 10 | 15 | 66.67% |
