| 1928 | 【基础】黑色星期五（friday） | 26/42 | |
| 2179 | 【基础】数字三角形 | 9/34 | |
| 2199 | 【基础】双重回文数 Dual Palindromes | 15/47 | |
| 3869 | P2910 [USACO08OPEN] Clear And Present Danger S | 4/7 | |
| 3930 | P1108 [USACO99FALL] 低价购买 | 5/13 | |
| 3932 | P1697 [USACO18JAN] Lifeguards B | 2/2 | |
| 3943 | P1118 [USACO06FEB] Backward Digit Sums G/S | 4/4 | |
| 3946 | P1204 [USACO1.2] 挤牛奶 Milking Cows | 2/5 | |
| 3947 | P1206 [USACO1.2] 回文平方数 Palindromic Squares | 6/19 | |
| 3948 | P1208 [USACO1.3] 混合牛奶 Mixing Milk | 2/3 | |
| 3969 | P1207 [USACO1.2] 双重回文数 Dual Palindromes | 8/24 | |
| 3972 | P1211 [USACO1.3]牛式 Prime Cryptarithm | 1/1 | |