| Platinum 3문제 expand_more |
| 4105 | Cow Dating | USACO 2019 February Platinum | 0 | 0 | |
| 4106 | Moorio Kart | USACO 2019 February Platinum | 0 | 0 | |
| 4107 | Mowing Mischief | USACO 2019 February Platinum | 0 | 1 | 0.00% |
| Gold 3문제 expand_more |
| 4108 | Cow Land | USACO 2019 February Gold | 0 | 0 | |
 4109 | Dishwashing | USACO 2019 February Gold | 1 | 1 | 100.00% |
 4110 | Painting the Barn | USACO 2019 February Gold | 1 | 1 | 100.00% |
| Silver 3문제 expand_more |
| 4111 | Sleepy Cow Herding | USACO 2019 February Silver | 0 | 0 | |
| 4112 | Painting the Barn | USACO 2019 February Silver | 1 | 2 | 50.00% |
| 4113 | The Great Revegetation | USACO 2019 February Silver | 0 | 0 | |
| Bronze 3문제 expand_more |
 4114 | 수직선 세 점 translate 다국어 | USACO 2019 February Bronze | 7 | 20 | 35.00% |
| 4115 | The Great Revegetation | USACO 2019 February Bronze | 1 | 1 | 100.00% |
| 4116 | Measuring Traffic | USACO 2019 February Bronze | 1 | 1 | 100.00% |
