| 1287 | USACO 1.3.1 Mixing Milk 混合牛奶 | 0/1 | |
| 1288 | USACO 1.3.2 Barn Repair 修理牛棚 | 1/1 | |
| 1289 | USACO 1.3.3 Prime Cryptarithm 牛式 | 1/1 | |
| 1290 | USACO 1.3.4 Combination Lock 号码锁 | 1/1 | |
| 1291 | USACO 1.3.5 Wormholes 虫洞 | 1/1 | |
| 1292 | USACO 1.3.6 Ski Course Design 滑雪场设计 | 1/1 | |
| 1293 | USACO 1.4.1 Arithmetic Progressions 等差数列 | 0/1 | |
| 1294 | USACO 1.4.2 Mother's Milk 母亲的牛奶 | 0/1 | |
| 1295 | USACO 1.5.1 Number Triangles 数字金字塔 | 0/1 | |
| 1296 | USACO 1.5.2 Prime Palindromes 回文质数 | 1/1 | |
| 1297 | USACO 1.5.3 SuperPrime Rib 特殊的质数肋骨 | 1/1 | |
| 1298 | USACO 2.1.1 The Castle 城堡 | 1/1 | |
| 1299 | USACO 2.1.2 Ordered Fractions顺序的分数 | 1/1 | |
| 1300 | USACO 2.1.3 Sorting a Three-Valued Sequence三值的排序 | 1/1 | |
| 1301 | USACO 2.1.4 Healthy Holsteins健康的好斯坦奶牛 | 1/2 | |
| 1302 | USACO 2.1.5 Hamming Codes海明码 | 1/1 | |
| 1303 | USACO 2.2.1 Preface Numbering序言页码 | 1/1 | |
| 1304 | USACO 2.2.2 Subset Sums集合背包动规 | 1/1 | |
| 1305 | USACO 2.2.3 Runaround Numbers循环数 | 1/1 | |
| 1306 | USACO 2.2.4 Party Lamps派对灯 | 1/1 | |
| 1307 | USACO 2.3.1 The Longest Prefix最长前缀 | 1/1 | |
| 1308 | USACO 2.3.2 Cow Pedigrees 奶牛家谱 | 1/1 | |
| 1309 | USACO 2.3.3 zero sum 和为零 | 1/2 | |
| 1310 | USACO 2.3.4 Money Systems 货币系统 | 1/2 | |
| 1311 | USACO 2.3.5 Controlling Companies (concom) 控制公司 | 1/1 | |
| 1312 | USACO 2.4.1 The Tamworth Two 两只塔姆沃斯牛 | 0/1 | |
| 1313 | USACO 2.4.2 Overfencing 穿越栅栏 | 0/1 | |
| 1314 | USACO 2.4.3 Cow Tours牛的旅行最短路径 | 0/1 | |
| 1315 | USACO 2.4.4 Bessie Come Home 回家最短路径 | 1/1 | |
| 1316 | USACO 2.4.5 Fractions to Decimals 分数化小数 | 1/1 | |
| 1317 | USACO 3.1.1 Agri-Net 最短网络最小生成树 | 1/1 | |
| 1318 | USACO 3.1.2 Score Inflation 总分背包动规 | 1/2 | |
| 1319 | USACO 3.1.3 Humble Numbers丑数堆 | 1/1 | |
| 1320 | USACO 3.1.4 Contact 联系 | 1/1 | |
| 1321 | USACO 3.1.5 Stamps 邮票 | 1/1 | |
| 1322 | USACO 3.2.1 Factorials阶乘数学 | 1/1 | |
| 1323 | USACO 3.2.2 Stringsobits 01串 | 1/2 | |
| 1324 | USACO 3.2.3 Spinning Wheels 纺车的轮子 | 1/1 | |
| 1325 | USACO 3.2.4 Feed Ratios 饲料调配 | 1/1 | |
| 1326 | USACO 3.2.5 Magic Squares 魔板 | 1/1 | |
| 1327 | USACO 3.2.6 Sweet Butter 香甜的黄油 | 1/1 | |
| 1328 | USACO 3.3.1 Riding The Fences 骑马修栅栏 | 1/1 | |
| 1329 | USACO 3.3.2 Shopping Offers 商店购物 | 1/1 | |
| 1330 | USACO 3.3.3 Camelot 亚瑟王的宫殿 | 0/1 | |
| 1331 | USACO 3.3.4 Home on the Range 家的范围 | 1/1 | |
| 1332 | USACO 3.3.5 A Game 游戏博弈 | 1/1 | |
| 1333 | USACO 3.4.1 American Heritage 美国血统 | 1/1 | |
| 1334 | USACO 3.4.2 Electric Fence 电网 | 1/1 | |
| 1335 | USACO 3.4.3 Raucous Rockers “破锣摇滚”乐队 | 1/1 | |
| 1336 | USACO 4.1.1 Beef McNuggets 麦香牛块 | 1/1 | |