| 题目编号 | 标题 | 来源/分类 | 解决 | 提交 | |
| A | Ski Lessons | USACO Open 2009 Gold | 0 | 0 | |
| B | Work Scheduling | USACO 2009 Open Gold | 0 | 19 | |
| C | Tower of Hay | USACO 2009 Open Gold | 0 | 4 | |
| D | Bovine Embroidery | USACO 2009 Open | 0 | 0 | |
| E | Time Cards | USACO 2009 Open Bronze | 10 | 18 | |
| F | O Those Fads | USACO 2009 Open | 10 | 40 | |
| G | Good Grass | USACO 2009 Bronze | 11 | 16 | |
| H | Treasure Cave | USACO 2009 Bronze | 6 | 7 | |
| I | Hide and Seek | USACO 2009 Silver | 1 | 7 | |
| J | Cow Line | USACO 2009 Silver | 8 | 29 | |
| K | Cow Digit Game | USACO 2009 Open | 5 | 27 | |
| L | Grazing2 | USACO 2009 Silver | 0 | 0 |