| 1572 | 【基础】黑色星期五(friday) | 7/18 | |
| 1768 | 【基础】跳房子 | 18/37 | |
| 1823 | 【提高】谷仓的安保 | 15/103 | |
| 1910 | 【基础】愤怒的奶牛 | 5/89 | |
| 1917 | 【基础】探测池塘 | 4/15 | |
| 1918 | 【基础】相似的奶牛 | 2/5 | |
| 1919 | 【基础】数字三角形 | 1/6 | |
| 1920 | 【基础】麦香牛肉 | 1/2 | |
| 1926 | 【提高】立方体积木Cube Stacking | 0/1 | |
| 1929 | 【基础】最短网络 Agri-Net(USACO3.1) | 7/54 | |
| 1931 | 【基础】Out of Hay S[USACO05MAR] | 4/46 | |
| 1937 | 【基础】贪婪的送礼者Greedy Gift Givers(USACO1.1) | 1/7 | |
| 1938 | 【基础】回文平方数 Palindromic Squares | 2/12 | |
| 1939 | 【基础】双重回文数 Dual Palindromes | 1/5 | |
| 1940 | 【基础】混合牛奶 Mixing Milk | 74/534 | |
| 1941 | 【基础】修理牛棚 Barn Repair | 2/12 | |
| 1942 | 【提高】回文质数 Prime Palindromes | 2/104 | |
| 1943 | 【基础】特殊的质数肋骨 Superprime Rib | 6/64 | |
| 1944 | 【基础】集合 Subset Sums | 5/24 | |
| 2091 | 【基础】回家 Bessie Come Home | 3/6 | |
| 2113 | 【入门】卫星照片 USACO 2005 NOV | 3/8 | |
| 2151 | 【基础】Even More Odd Photos | 3/4 | |
| 2152 | 【提高】Comfortable Cows | 0/2 | |
| 2213 | 【基础】相同数的合并-USACO16OPEN | 2/3 | |
| 4640 | [USACO1.1] 你的飞碟在这儿 Your Ride Is Here | 0/0 | |
| 4641 | [USACO1.2] 方块转换 Transformations | 0/0 | |
| 4642 | [USACO1.5] 回文质数 Prime Palindromes | 0/0 | |
| 4658 | [USACO06DEC] 梦中的统计 Dream Counting B | 0/0 | |
| 4660 | [USACO03FEB] 垂直柱状图 Vertical Histogram | 0/0 | |
| 4677 | [USACO08OCT] Bovine Bones G | 0/0 | |
| 4763 | [USACO1.3] 混合牛奶 Mixing Milk | 0/0 | |
| 4764 | [USACO1.5] 回文质数 Prime Palindromes | 0/0 | |
| 4765 | [USACO1.5] 八皇后 Checker Challenge | 0/0 | |
| 4778 | [USACO2.4] 两只塔姆沃斯牛 The Tamworth Two | 0/0 | |
| 4781 | [USACO10OCT] Lake Counting S | 0/0 | |
| 4783 | 迷宫 | 0/0 | |
| 4790 | [USACO11OPEN] Corn Maze S | 0/0 | |
| 4805 | [USACO07DEC] Bookshelf B | 0/0 | |
| 4807 | [USACO08FEB] Meteor Shower S | 0/0 | |
| 4809 | [USACO17JAN] Secret Cow Code S | 0/0 | |
| 4828 | [USACO02FEB] 杂务 | 0/0 | |
| 4852 | [USACO3.4] 美国血统 American Heritage | 0/0 | |
| 4868 | [USACO06DEC] Cow Picnic S | 0/0 | |
| 4869 | [USACO08DEC] Patting Heads S | 0/0 | |
| 4873 | [USACO16DEC] Cities and States S | 0/0 | |
| 4906 | [IOI 1996 / USACO2.3] 最长前缀 Longest Prefix | 0/0 | |
| 4910 | 逛画展 | 0/0 | |
| 4915 | [USACO12FEB] Overplanting S | 0/0 | |
| 4926 | [USACO04OPEN] MooFest G | 0/0 | |
| 4932 | [USACO06NOV] Bad Hair Day S | 0/0 | |
| 4933 | [USACO07JAN] Balanced Lineup G | 0/0 | |
| 4934 | [USACO07MAR] Face The Right Way G | 0/2 | |
| 4935 | [USACO08DEC] Secret Message G | 0/0 | |
| 4936 | [USACO09OCT] Invasion of the Milkweed G | 0/0 | |
| 4937 | [USACO11MAR] Brownie Slicing G | 0/2 | |
| 4938 | [USACO11NOV] Cow Lineup S | 0/0 | |
| 4939 | [USACO16OPEN] Diamond Collector S | 0/0 | |
| 4951 | [USACO18OPEN] Out of Sorts G | 0/0 | |