| ID | 题目 显示标签 隐藏标签 | AC / 尝试 | 难度 | |
|---|---|---|---|---|
| 40 | USACO26FIRB1 Chip Exchange | 1 / 5 | 10 | |
| 41 | USACO26FIRB2 COW Splits | 0 / 0 | (无) | |
| 42 | USACO26FIRB3 Photoshoot | 0 / 0 | (无) | |
| 43 | USACO26SECB1 It's Mooin' Time IV | 1 / 2 | 10 | |
| 44 | USACO26SECB2 Moo Hunt | 1 / 6 | 10 | |
| 45 | USACO26SECB3 Purchasing Milk | 1 / 7 | 10 |