| Platinum 3문제 expand_more |
| 4069 | Out of Sorts | USACO 2018 US Open Platinum | 0 | 0 | |
| 4070 | Train Tracking | USACO 2018 US Open Platinum | 0 | 0 | |
 4071 | Disruption | USACO 2018 US Open Platinum | 1 | 1 | 100.00% |
| Gold 3문제 expand_more |
| 4072 | Out of Sorts | USACO 2018 US Open Gold | 0 | 0 | |
 4073 | Milking Order | USACO 2018 US Open Gold | 3 | 4 | 75.00% |
| 4074 | Talent Show | USACO 2018 US Open Gold | 1 | 2 | 50.00% |
| Silver 3문제 expand_more |
| 4075 | Out of Sorts | USACO 2018 US Open Silver | 1 | 1 | 100.00% |
| 4076 | Lemonade Line | USACO 2018 US Open Silver | 0 | 0 | |
| 4077 | Multiplayer Moo | USACO 2018 US Open Silver | 0 | 0 | |
| Bronze 3문제 expand_more |
 4078 | Team Tic Tac Toe | USACO 2018 US Open Bronze | 2 | 2 | 100.00% |
| 4079 | Milking Order | USACO 2018 US Open Bronze | 2 | 9 | 22.22% |
| 4080 | Family Tree | USACO 2018 US Open Bronze | 1 | 4 | 25.00% |
