| Gold 3문제 expand_more |
| 3780 | Tied Down | USACO 2012 US Open Gold | 0 | 0 | |
| 3781 | Bookshelf | USACO 2012 US Open Gold | 0 | 0 | |
 3782 | 소를 균형있게 나누자 (Balanced Cow Subsets) | USACO 2012 US Open Gold | 4 | 12 | 33.33% |
| Silver 3문제 expand_more |
| 3783 | Unlocking Blocks | USACO 2012 US Open Silver | 0 | 0 | |
| 3784 | Bookshelf (Silver) | USACO 2012 US Open Silver | 0 | 0 | |
| 3785 | Running Laps | USACO 2012 US Open Silver | 0 | 0 | |
| Bronze 4문제 expand_more |
| 3786 | Cows in a Row | USACO 2012 US Open Bronze | 0 | 0 | |
| 3787 | Three Lines | USACO 2012 US Open Bronze | 0 | 0 | |
| 3788 | Islands | USACO 2012 US Open Bronze | 0 | 0 | |
| 3789 | Unlocking Blocks | USACO 2012 US Open Bronze | 0 | 0 | |
