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2618
USACO 历年题目（按难度分类，同难度按原顺序）
🔴 入门
lg2911 [USACO08OCT] Bovine Bones G
🟠 普及−
lg10497 [USACO03Open] Lost Cows
lg1376 [USACO05MAR] Yogurt factory G机器工厂
lg1824 [USACO05FEB] 进击的奶牛 Aggressive Cows G
lg6065 [USACO05JAN] Sumsets S
lg2859 [USACO06FEB] Stall Reservations S
lg6244 [USACO06OPEN] County Fair Events S
lg1588 [USACO07OPEN] Catch That Cow S
lg2666 [USACO07OCT] Bessie's Secret Pasture S
lg2676 [USACO07DEC] Bookshelf B
lg2677 [USACO07DEC] Bookshelf 2 B
lg2871 [USACO07DEC] Charm Bracelet S
lg2873 [USACO07DEC] Mud Puddles S
lg6200 [USACO07OCT] Super Paintball G
lg2925 [USACO08DEC] Hay For Sale S
lg2949 [USACO09OPEN] Work Scheduling G
lg2970 [USACO09DEC] Selfish Grazing S
lg1596 [USACO10OCT] Lake Counting S
lg2616 [USACO10JAN] Buying Feed II S
lg2978 [USACO10JAN] Tea Time S
lg3028 [USACO10OCT] Soda Machine G
lg6181 [USACO10OPEN] Mountain Watching S
lg6183 [USACO10MAR] The Rock Game S（改）
lg3009 [USACO11JAN]Profits S
lg3019 [USACO11MAR] Meeting Place S
🟡 普及
lg2255 [USACO02Open]Mountain Majesties
lg2340 [USACO03FALL] Cow Exhibition G
lg10450 [USACO03MAR] Best Cow Fences G
lg1669 [USACO04DEC] Bad Cowtractors S
lg1670 [USACO04DEC] Tree Cutting S
lg2690 [USACO04NOV] Apple Catching G
lg5097 [USACO04OPEN] Cave Cows 2
lg5098 [USACO04OPEN] Cave Cows 3
lg1547 [USACO05MAR] Out of Hay S
lg1671 [USACO05FEB] Rigging the Bovine Election S
lg1672 [USACO05FEB] Feed Accounting S
lg1673 [USACO05FEB] Part Acquisition S
lg1842 [USACO05NOV] Cow Acrobats S
lg5194 [USACO05DEC] Scales S
lg6067 [USACO05JAN] Moo Volume S
lg6770 [USACO05MAR] Checking an Alibi S不在场的证明
lg6771 [USACO05MAR] Space Elevator 太空电梯
lg1118 [USACO06FEB] Backward Digit Sums G/S
lg2850 [USACO06DEC] Wormholes G
lg2853 [USACO06DEC] Cow Picnic S
lg2855 [USACO06DEC] River Hopscotch S
lg2858 [USACO06FEB] Treats for the Cows G/S
lg2866 [USACO06NOV] Bad Hair Day S
lg6205 [USACO06JAN] Dollar Dayz S
lg6207 [USACO06OCT] Cows on Skates G
lg6208 [USACO06OCT] Cow Pie Treasures G
lg6245 [USACO06OPEN] The Climbing Wall S
lg1360 [USACO07MAR] Gold Balanced Lineup G
lg1474 [USACO07OCT] Cow Cash G
lg1649 [USACO07OCT] Obstacle Course S
lg1821 [USACO07FEB] Cow Party S
lg2385 [USACO07FEB] Bronze Lilypad Pond B
lg2872 [USACO07DEC] Building Roads S
lg2878 [USACO07JAN] Protecting the Flowers S
lg2879 [USACO07JAN] Tallest Cow S
lg2880 [USACO07JAN] Balanced Lineup G
lg2883 [USACO07MAR] Cow Traffic S
lg2884 [USACO07MAR] Monthly Expense S
lg2887 [USACO07NOV] Sunscreen G
lg2888 [USACO07NOV] Cow Hurdles S
lg2889 [USACO07NOV] Milking Time S
lg6140 [USACO07NOV] Best Cow Line S
lg1550 [USACO08OCT] Watering Hole G
lg2419 [USACO08JAN] Cow Contest S
lg2910 [USACO08OPEN] Clear And Present Danger S
lg2926 [USACO08DEC] Patting Heads S
lg2932 [USACO09JAN] Earthquake Damage G
lg2935 [USACO09JAN] Best Spot S
lg2942 [USACO09MAR] Moon Mooing G
lg2946 [USACO09MAR] Cow Frisbee Team S
lg2947 [USACO09MAR] Look Up S
lg2951 [USACO09OPEN] Hide and Seek S
lg2983 [USACO10FEB] Chocolate Buying S
lg2984 [USACO10FEB] Chocolate Giving S
lg2985 [USACO10FEB] Chocolate Eating S
lg2988 [USACO10MAR] Test Taking S
lg2989 [USACO10MAR] Need For Speed S
lg2996 [USACO10NOV] Visiting Cows G
lg2997 [USACO10NOV] Banner S
lg2999 [USACO10NOV] Chocolate Milk S
lg3001 [USACO10DEC] Big Macs Around the World G
lg3003 [USACO10DEC] Apple Delivery S
lg3005 [USACO10DEC]The Trough Game S
lg3027 [USACO10OCT] Making Money G
lg1825 [USACO11OPEN] Corn Maze S
lg3010 [USACO11JAN] Dividing the Gold S
lg3015 [USACO11FEB] Best Parenthesis S
lg3016 [USACO11FEB] The Triangle S
lg3020 [USACO11MAR] Package Delivery S
lg3021 [USACO11MAR] Bovine Bridge Battle S
lg3026 [USACO11OPEN] Learning Languages S
🟢 普及+/提高−
lg1284 [USACO02FEB] 三角形牧场
lg4953 [USACO02FEB] Cow Cycling
lg2341 [USACO03FALL / HAOI2006] 受欢迎的牛 G
lg10475 [USACO03FALL] Milking Grid（数据加强版）
lg1653 [USACO04DEC] Cow Ski Area G
lg1668 [USACO04DEC] Cleaning Shifts S
lg5092 [USACO04OPEN] Cube Stacking
lg5094 [USACO04OPEN] MooFest G 加强版
lg5096 [USACO04OPEN] Cave Cows 1
lg5099 [USACO04OPEN] Cave Cows 4
P2856 [USACO05NOV] Grazing on the Run G
lg4878 [USACO05DEC] Layout G
lg5195 [USACO05DEC] Knights of Ni S
lg6063 [USACO05JAN] The Wedding Juicer G
lg6064 [USACO05JAN] Naptime G
lg6066 [USACO05JAN] Watchcow S
lg6081 [USACO05DEC] Barn Expansion G
lg9832 [USACO05OPEN] Lazy Cows G
lg9833 [USACO05OPEN] Expedition G
lg9834 [USACO05OPEN] Around the world G
lg9835 [USACO05OPEN] Landscaping G
lg1879 [USACO06NOV] Corn Fields G
lg2852 [USACO06DEC] Milk Patterns G
lg2854 [USACO06DEC] Cow Roller Coaster S
lg2856 [USACO06FEB] Cellphones G
lg2862 [USACO06JAN] Corral the Cows G
lg2863 [USACO06JAN] The Cow Prom S
lg2867 [USACO06NOV] Big Square S
lg6079 [USACO06MAR] Milk Team Select G
lg1606 [USACO07FEB] Lilypad Pond G
lg2870 [USACO07DEC] Best Cow Line G
lg2881 [USACO07MAR] Ranking the Cows G
lg2882 [USACO07MAR] Face The Right Way G
lg2886 [USACO07NOV] Cow Relays G
lg2890 [USACO07OPEN] Cheapest Palindrome G
lg6202 [USACO07CHN] Summing Sums G
lg1948 [USACO08JAN] Telephone Lines S
lg2899 [USACO08JAN] Cell Phone Network G
lg2916 [USACO08NOV] Cheering up the Cow G
lg2921 [USACO08DEC] Trick or Treat on the Farm G
lg2922 [USACO08DEC] Secret Message G
lg2927 [USACO08DEC] Jigsaw Puzzles S
lg3870 [USACO08NOV] Light Switching G
lg2017 [USACO09DEC] Dizzy Cows G
lg2938 [USACO09FEB] Stock Market G
lg2971 [USACO10HOL] Cow Politics G
lg2979 [USACO10JAN] Cheese Towers S
lg2981 [USACO10FEB] Cows on Ice G
lg2986 [USACO10MAR] Great Cow Gathering G
lg2994 [USACO10OCT] Dinner Time S
lg6182 [USACO10OPEN] Time Travel S
lg2176 [USACO11DEC] RoadBlock S
lg2344 [USACO11FEB] Generic Cow Protests G
lg2627 [USACO11OPEN] Mowing the Lawn G
lg3012 [USACO11FEB] Cowlphabet G
lg3014 [USACO11FEB] Cow Line S
lg3018 [USACO11MAR] Tree Decoration G
章节 2. 普及−
进行中
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| lg10497 【树状数组】还原牛序列[USACO03Open] Lost Cows | 90 | 36 | 5 |
| lg1376 【贪心】[USACO05MAR] Yogurt factory G机器工厂 | 73 | 33 | 4 |
| lg1824 *【二分】最小值最大[USACO05FEB] 进击的奶牛 Aggressive Cows G | 183 | 61 | 6 |
| lg6065 [USACO05JAN] Sumsets S | 28 | 3 | 9 |
| lg2859 *【堆】使用电脑不冲突 [USACO06FEB] Stall Reservations S | 270 | 76 | 6 |
| lg6244 [USACO06OPEN] County Fair Events S | 44 | 16 | 6 |
| lg1588 B15 BFS [USACO07OPEN] Catch That Cow S | 272 | 42 | 8 |
| lg2666 [USACO07OCT] Bessie's Secret Pasture S | 93 | 28 | 6 |
| lg2676 [USACO07DEC] Bookshelf B | 69 | 40 | 3 |
| lg2677 [USACO07DEC] Bookshelf 2 B | 74 | 35 | 4 |
| lg2871 E08【模板】背包DP 01背包[USACO07DEC] Charm Bracelet S | 244 | 56 | 7 |
| lg2873 [USACO07DEC] Mud Puddles S | 65 | 24 | 5 |
| lg6200 [USACO07OCT] Super Paintball G | 73 | 22 | 6 |
| lg2925 【背包：填满型01背包】尽量填满2️⃣[USACO08DEC] Hay For Sale S | 129 | 46 | 5 |
| lg2949 A40*【反悔贪心】工作安排[USACO09OPEN] Work Scheduling G | 262 | 55 | 7 |
| lg2970 A29 贪心算法【思维】最多无相交线段数 [USACO09DEC] Selfish Grazing S | 255 | 60 | 7 |
| lg1596 B10【递归：Floodfill】矩阵连通块统计 [USACO10OCT] Lake Counting S | 41 | 22 | 3 |
| lg2616 【贪心】购买饲料[USACO10JAN] Buying Feed II S | 64 | 33 | 3 |
| lg2978 【并查集】判断两点是否连通[USACO10JAN] Tea Time S | 31 | 25 | 1 |
| lg3028 【一维差分】数轴最多覆盖数[USACO10OCT] Soda Machine G | 172 | 42 | 7 |
| lg6181 【模拟】哪一座山最宽[USACO10OPEN] Mountain Watching S | 23 | 11 | 6 |
| lg6183 【模拟】生成格雷码1️⃣[USACO10MAR] The Rock Game S（改） | 38 | 11 | 7 |
| lg3009 【思维】最大连续和[USACO11JAN]Profits S | 332 | 97 | 6 |
| lg3019 【LCA练习】[USACO11MAR] Meeting Place S | 12 | 6 | 9 |
章节 3. 普及
进行中
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| 2618 *(隐藏) | 0 | 0 | (无) |
| lg2340 [USACO03FALL] Cow Exhibition G | 7 | 2 | 10 |
| lg10450 *【二分】平均值最大（长度≥L）[USACO03MAR] Best Cow Fences G | 419 | 76 | 8 |
| lg1669 D08 [USACO04DEC] Bad Cowtractors S | 15 | 7 | 8 |
| lg1670 [USACO04DEC] Tree Cutting S | 1 | 1 | 10 |
| lg2690 [USACO04NOV] Apple Catching G | 2 | 1 | 10 |
| lg5097 [USACO04OPEN] Cave Cows 2 | 2 | 2 | 10 |
| lg5098 [USACO04OPEN] Cave Cows 3 | 2 | 2 | 10 |
| lg1547 [USACO05MAR] Out of Hay S | 4 | 3 | 10 |
| lg1671 [USACO05FEB] Rigging the Bovine Election S | 1 | 1 | 10 |
| lg1672 [USACO05FEB] Feed Accounting S | 3 | 3 | 10 |
| lg1673 [USACO05FEB] Part Acquisition S | 12 | 1 | 10 |
| lg1842 A24【贪心】奶牛玩杂技[USACO05NOV] Cow Acrobats S | 120 | 61 | 3 |
| lg5194 [USACO05DEC] Scales S | 2 | 1 | 10 |
| lg6067 [USACO05JAN] Moo Volume S | 1 | 1 | 10 |
| lg6770 [USACO05MAR] Checking an Alibi S不在场的证明 | 2 | 2 | 10 |
| lg6771 [USACO05MAR] Space Elevator 太空电梯 | 16 | 11 | 7 |
| lg1118 [USACO06FEB] Backward Digit Sums G/S | 3 | 2 | 10 |
| lg2850 D03 D113【最短路：spfa判断负环】混合图判断负环[USACO06DEC] Wormholes G | 119 | 39 | 6 |
| lg2853 [USACO06DEC] Cow Picnic S | 9 | 3 | 10 |
| lg2855 [USACO06DEC] River Hopscotch S | 2 | 2 | 10 |
| lg2858 [USACO06FEB] Treats for the Cows G/S | 3 | 3 | 10 |
| lg2866 [USACO06NOV] Bad Hair Day S | 5 | 4 | 10 |
| lg6205 [USACO06JAN] Dollar Dayz S | 20 | 9 | 7 |
| lg6207 [USACO06OCT] Cows on Skates G | 8 | 1 | 10 |
| lg6208 [USACO06OCT] Cow Pie Treasures G | 7 | 3 | 10 |
| lg6245 [USACO06OPEN] The Climbing Wall S | 4 | 2 | 10 |
| lg1360 [USACO07MAR] Gold Balanced Lineup G | 16 | 9 | 7 |
| lg1474 [USACO2.3] 货币系统Money System / [USACO07OCT] Cow Cash G | 38 | 19 | 4 |
| lg1649 【宽搜】矩阵最少转90度次数[USACO07OCT] Obstacle Course S | 86 | 25 | 6 |
| lg1821 【最短路】农场派对[USACO07FEB] Cow Party S | 28 | 15 | 5 |
| lg2385 [USACO07FEB] Bronze Lilypad Pond B | 5 | 3 | 10 |
| lg2872 D131【最小生成树】[USACO07DEC] Building Roads S | 61 | 27 | 4 |
| lg2878 【贪心】[USACO07JAN] Protecting the Flowers S | 46 | 22 | 4 |
| lg2879 *【差分】最高的牛[USACO07JAN] Tallest Cow S | 52 | 22 | 5 |
| lg2880 A12*【RMQ】区间最大和最小差[USACO07JAN] Balanced Lineup G | 187 | 43 | 7 |
| lg2883 [USACO07MAR] Cow Traffic S | 4 | 2 | 10 |
| lg2884 *【二分】最大值最小（分m段）[USACO07MAR] Monthly Expense S | 247 | 78 | 6 |
| lg2887 【贪心】[USACO07NOV] Sunscreen G | 240 | 78 | 6 |
| lg2888 D04 【多源最短路floyd】[USACO07NOV] Cow Hurdles S | 91 | 35 | 5 |
| lg2889 [USACO07NOV] Milking Time S | 99 | 24 | 7 |
| lg6140 【贪心】新序列的最小字典序[USACO07NOV] Best Cow Line S | 100 | 40 | 5 |
| lg1550 D130 最小生成树 Kruskal 算法 [USACO08OCT] Watering Hole G | 85 | 52 | 2 |
| lg2419 【多源最短路floyd 】[USACO08JAN] Cow Contest S | 17 | 15 | 5 |
| lg2910 D04 Floyd 算法[USACO08OPEN] Clear And Present Danger S | 115 | 44 | 5 |
| lg2926 【思维】 $A_i$ 是数列中多少个数的倍数 [USACO08DEC] Patting Heads S | 11 | 8 | 8 |
| lg2932 【递归：Floodfill】统计无法到点1的点数[USACO09JAN] Earthquake Damage G | 26 | 9 | 7 |
| lg2935 D04 [USACO09JAN] Best Spot S | 81 | 42 | 3 |
| lg2942 [USACO09MAR] Moon Mooing G | 1 | 1 | 10 |
| lg2946 【背包练习】和为K倍数的方案数[USACO09MAR] Cow Frisbee Team S | 124 | 26 | 7 |
| lg2947 【栈：单调栈】向右看齐[USACO09MAR] Look Up S | 270 | 63 | 7 |
| lg2951 【最短路：dijkstra算法】单源最短路[USACO09OPEN] Hide and Seek S | 163 | 34 | 7 |
| lg2983 【贪心】[USACO10FEB] Chocolate Buying S | 104 | 30 | 6 |
| lg2984 【最短路】 [USACO10FEB] Chocolate Giving S | 19 | 11 | 6 |
| lg2985 【二分】最小值最大[USACO10FEB] Chocolate Eating S | 151 | 51 | 6 |
| lg2988 [USACO10MAR] Test Taking S | 70 | 11 | 8 |
| lg2989 *【01分数规划】[USACO10MAR] Need For Speed S | 49 | 17 | 6 |
| lg2996 【树形DP：相邻点互斥】无根树最多不相邻点数 [USACO10NOV] Visiting Cows G | 187 | 31 | 8 |
| lg2997 【组合数：综合计算】平面两点之间不经过整数点的方案数[USACO10NOV] Banner S | 53 | 14 | 7 |
| lg2999 【拓扑】关键点[USACO10NOV] Chocolate Milk S | 10 | 4 | 9 |
| lg3001 [USACO10DEC] Big Macs Around the World G | 1 | 1 | 10 |
| lg3003 【最短路】出发点到两点的最短距离[USACO10DEC] Apple Delivery S | 55 | 19 | 6 |
| lg3005 【递归】解01方程组 [USACO10DEC]The Trough Game S | 29 | 15 | 5 |
| lg3027 【背包：价值填满型完全背包】山洞宝石3[USACO10OCT] Making Money G | 171 | 36 | 7 |
| lg1825 【宽搜】玉米迷宫[USACO11OPEN] Corn Maze S | 114 | 31 | 6 |
| lg3010 *【背包：方案数填满型01背包】平分3️⃣[USACO11JAN] Dividing the Gold S | 246 | 25 | 9 |
| lg3015 *【栈】括号序列[USACO11FEB] Best Parenthesis S | 130 | 37 | 6 |
| lg3016 【模拟+优化】等边三角形平均值最大[USACO11FEB] The Triangle S | 122 | 37 | 6 |
| lg3020 【最短路练习】[USACO11MAR] Package Delivery S | 13 | 9 | 7 |
| lg3021 【计算几何：四点中心对称】[USACO11MAR] Bovine Bridge Battle S | 3 | 3 | 10 |
| lg3026 【并查集】学习语言[USACO11OPEN] Learning Languages S | 109 | 28 | 7 |
章节 4. 普及+/提高−
进行中
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| lg1284 [USACO02FEB] 三角形牧场 | 27 | 7 | 7 |
| lg4953 [USACO02FEB] Cow Cycling | 1 | 1 | 10 |
| lg2341 D15_2【强连通SCC】[USACO03FALL / HAOI2006] 受欢迎的牛 G | 116 | 42 | 5 |
| lg10475 【KMP】重复矩阵[USACO03FALL] Milking Grid（数据加强版） | 72 | 33 | 4 |
| lg1653 D158 SCC 缩点[USACO04DEC] Cow Ski Area G | 4 | 2 | 10 |
| lg1668 [USACO04DEC] Cleaning Shifts S | 11 | 6 | 9 |
| lg5092 [USACO04OPEN] Cube Stacking | 1 | 1 | 10 |
| lg5094 [USACO04OPEN] MooFest G 加强版 | 42 | 5 | 9 |
| lg5096 【多源最短路floyd 】[USACO04OPEN] Cave Cows 1 | 2 | 2 | 10 |
| lg5099 [USACO04OPEN] Cave Cows 4 | 2 | 2 | 10 |
| P2856 【动态规划：区间中间推】奶牛吃草[USACO05NOV] Grazing on the Run G | 25 | 11 | 6 |
| lg4878 D118【差分约束】[USACO05DEC] Layout G | 137 | 23 | 8 |
| lg5195 [USACO05DEC] Knights of Ni S | 4 | 4 | 10 |
| lg6063 [USACO05JAN] The Wedding Juicer G | 2 | 1 | 10 |
| lg6064 [USACO05JAN] Naptime G | 18 | 7 | 8 |
| lg6066 D166 欧拉回路 [USACO05JAN] Watchcow S | 165 | 40 | 7 |
| lg6081 [USACO05DEC] Barn Expansion G | 7 | 4 | 10 |
| lg9832 [USACO05OPEN] Lazy Cows G | 2 | 1 | 10 |
| lg9833 【贪心】奶牛探险 [USACO05OPEN] Expedition G | 36 | 21 | 3 |
| lg9834 [USACO05OPEN] Around the world G | 1 | 1 | 10 |
| lg9835 [USACO05OPEN] Landscaping G | 1 | 1 | 10 |
| lg1879 E26【状态压缩DP】玉米田 [USACO06NOV] Corn Fields G | 63 | 34 | 3 |
| lg2852 [USACO06DEC] Milk Patterns G | 6 | 2 | 10 |
| lg2854 [USACO06DEC] Cow Roller Coaster S | 2 | 2 | 10 |
| lg2856 [USACO06FEB] Cellphones G | 3 | 1 | 10 |
| lg2862 【离散化+二分】>=C的最小正方形[USACO06JAN] Corral the Cows G | 111 | 16 | 8 |
| lg2863 D14 [USACO06JAN] The Cow Prom S | 7 | 7 | 9 |
| lg2867 [USACO06NOV] Big Square S | 2 | 1 | 10 |
| lg6079 [USACO06MAR] Milk Team Select G | 21 | 4 | 8 |
| lg1606 [USACO07FEB] Lilypad Pond G | 1 | 1 | 10 |
| lg2870 [USACO07DEC] Best Cow Line G | 74 | 23 | 6 |
| lg2881 [USACO07MAR] Ranking the Cows G | 3 | 1 | 10 |
| lg2882 [USACO07MAR] Face The Right Way G | 9 | 4 | 9 |
| lg2886 D64【矩阵乘法】9：经过X条边最短路的长度[USACO07NOV] Cow Relays G | 35 | 16 | 5 |
| lg2890 [USACO07OPEN] Cheapest Palindrome G | 16 | 10 | 7 |
| lg6202 [USACO07CHN] Summing Sums G | 8 | 5 | 10 |
| lg1948 D76【最短路+DP】路径中的边权最大值最小[USACO08JAN] Telephone Lines S | 164 | 50 | 6 |
| lg2899 E69 树形DP [USACO08JAN] Cell Phone Network G | 75 | 31 | 5 |
| lg2916 D133【最小生成树】[USACO08NOV] Cheering up the Cow G | 11 | 5 | 9 |
| lg2921 【思维】能够到达的点数[USACO08DEC] Trick or Treat on the Farm G | 24 | 14 | 5 |
| lg2922 【字典树】[USACO08DEC] Secret Message G | 50 | 16 | 6 |
| lg2927 [USACO08DEC] Jigsaw Puzzles S | 21 | 13 | 5 |
| lg3870 C25_3*【线段树】[USACO08NOV] Light Switching G | [TJOI2009] 开关 | 94 | 23 | 7 |
| lg2017 【拓扑】混合图无环[USACO09DEC] Dizzy Cows G | 56 | 2 | 10 |
| lg2938 [USACO09FEB] Stock Market G | 17 | 9 | 7 |
| lg2971 D58【最近公共祖先LCA】树上同组两点的最大距离[USACO10HOL] Cow Politics G | 176 | 39 | 7 |
| lg2979 【背包练习】奶酪塔[USACO10JAN] Cheese Towers S | 134 | 20 | 8 |
| lg2981 【宽搜+set二分】冰上[USACO10FEB] Cows on Ice G | 7 | 6 | 9 |
| lg2986 E85 换根DP【树形DP】点边都带权的树的集会点[USACO10MAR] Great Cow Gathering G | 15 | 8 | 7 |
| lg2994 【贪心】牛抢座位[USACO10OCT] Dinner Time S | 186 | 26 | 8 |
| lg6182 【模拟：可持久化入门】时间旅行[USACO10OPEN] Time Travel S | 9 | 5 | 9 |
| lg2176 [USACO11DEC] RoadBlock S / [USACO14FEB]Roadblock G/S | 1 | 1 | 10 |
| lg2344 【树状数组】数星星2️⃣[USACO11FEB] Generic Cow Protests G | 39 | 9 | 7 |
| lg2627 E44【单调队列】连续长度不超过m个的最大总和[USACO11OPEN] Mowing the Lawn G | 72 | 26 | 5 |
| lg3012 【动态规划设计】单词接龙[USACO11FEB] Cowlphabet G | 2 | 2 | 10 |
| lg3014 【模拟】康托展开及逆运算[USACO11FEB] Cow Line S | 8 | 3 | 10 |
| lg3018 【递归+贪心】树上装饰[USACO11MAR] Tree Decoration G | 36 | 16 | 5 |