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USACO 铂金组 历年题目分类（按难度分类 & 年份倒序）131题
🟡 普及
lg3135 【动态规划：区间一维一边推】最大子矩阵2️⃣[USACO16JAN] Fort Moo P
🟢 普及+/提高−
lg4271 D59 树的直径 树上前缀和[USACO18FEB] New Barns P
lg3657 [USACO17FEB] Why Did the Cow Cross the Road II P
lg5202 [USACO19JAN] Redistricting P
lg2098 [USACO16DEC] Team Building P
lg3128 A11*【树上点差分】树上路径修改和点查询1[USACO15DEC] Max Flow P
lg3130 C02*【线段树】一维区间修改+区间询问[USACO15DEC] Counting Haybale P
🩵 提高
lg12031 [USACO25OPEN] Forklift Certified P
lg11676 [USACO25JAN] DFS Order P
lg8907 [USACO22DEC] Making Friends P
lg7530 [USACO21OPEN] United Cows of Farmer John P
lg7416 [USACO21FEB] No Time to Dry P
lg6275 [USACO20OPEN] Sprinklers 2: Return of the Alfalfa P
lg6142 [USACO20FEB] Delegation P
lg6143 [USACO20FEB] Equilateral Triangles P
lg5851 [USACO19DEC] Greedy Pie Eaters P
lg5852 [USACO19DEC] Bessie's Snow Cow P
lg4374 [USACO18OPEN] Disruption P
lg4090 A38 贪心算法 [USACO17DEC] Greedy Gift Takers P
lg3664 [USACO17OPEN] Modern Art P
lg3656 *【树状数组】最少交叉[USACO17FEB] Why Did the Cow Cross the Road I P
lg3605 C87*【树状数组+DFS】统计子树i中点权比wi大的点数[USACO17JAN] Promotion Counting P
lg3606 [USACO17JAN] Building a Tall Barn P
lg3147 [USACO16OPEN] 262144 P
lg2748 [USACO16OPEN] Landscaping P
lg6172 [USACO16FEB] Load Balancing P
lg3141 D138 [USACO16FEB] Fenced In P
lg3129 *【模拟+set】[USACO15DEC] High Card Low Card P
lg1715 [USACO16DEC] Lots of Triangles P
🔵 提高+/省选−
lg9984 [USACO23DEC] A Graph Problem P
lg9130 [USACO23FEB] Hungry Cow P
lg9019 [USACO23JAN] Tractor Paths P
lg8906 [USACO22DEC] Breakdown P
lg7293 [USACO21JAN] Sum of Distances P
lg7154 [USACO20DEC] Sleeping Cows P
lg6008 [USACO20JAN] Cave Paintings P
lg5242 [USACO19FEB] Cow Dating P
lg5155 [USACO18DEC] Balance Beam P
lg4182 [USACO18JAN] Lifeguards P
lg3136 [USACO16JAN] Mowing the Field P
🟣 省选/NOI−
lg16572 [USACO26OPEN] Arranging Cows
lg16573 [USACO26OPEN] Haybale Stacks
lg16574 [USACO26OPEN] Perfect Binary Trees
lg14983 [USACO26JAN1] Hoof, Paper, Scissors Triples P
lg14984 [USACO26JAN1] Lineup Counting Queries P
lg15263 [USACO26JAN2] Circle of Cows P
lg15579 [USACO26FEB] All Pairs Shortest Paths P
lg15581 [USACO26FEB] Min Max Subarrays II P
lg12032 [USACO25OPEN] Lazy Sort P
lg11845 [USACO25FEB] Min Max Subarrays P
lg11847 [USACO25FEB] True or False Test P
lg11458 [USACO24DEC] All Pairs Similarity P
lg11459 [USACO24DEC] It's Mooin' Time P
lg10283 [USACO24OPEN] Identity Theft P
lg10284 [USACO24OPEN] Splitting Haybales P
lg10285 [USACO24OPEN] Activating Robots P
lg10196 [USACO24FEB] Lazy Cow P
lg10141 [USACO24JAN] Merging Cells P
lg10142 [USACO24JAN] Mooball Teams III P
lg9985 [USACO23DEC] Train Scheduling P
lg9192 [USACO23OPEN] Pareidolia P
lg9193 [USACO23OPEN] Good Bitstrings P
lg9131 [USACO23FEB] Problem Setting P
lg9132 [USACO23FEB] Watching Cowflix P
lg9020 [USACO23JAN] Mana Collection P
lg9021 [USACO23JAN] Subtree Activation P
lg8908 [USACO22DEC] Palindromes P
lg8277 [USACO22OPEN] Up Down Subsequence P
lg8193 [USACO22FEB] Sleeping in Class P
lg8099 [USACO22JAN] Minimizing Haybales P
lg8100 [USACO22JAN] Counting Haybales P
lg8101 [USACO22JAN] Multiple Choice Test P
lg7984 [USACO21DEC] Tickets P
lg7985 [USACO21DEC] Paired Up P
lg7986 [USACO21DEC] HILO P
lg7532 [USACO21OPEN] Balanced Subsets P
lg7295 [USACO21JAN] Paint by Letters P
lg6144 [USACO20FEB] Help Yourself P
lg6009 [USACO20JAN] Non-Decreasing Subsequences P
lg6010 [USACO20JAN] Falling Portals P
lg5243 [USACO19FEB] Moorio Kart P
lg5203 [USACO19JAN] Exercise Route P
lg5204 [USACO19JAN] Train Tracking 2 P
lg5156 [USACO18DEC] Sort It Out P
lg5157 [USACO18DEC] The Cow Gathering P
lg4372 [USACO18OPEN] Out of Sorts P
lg4088 [USACO18FEB] Slingshot P
lg4270 [USACO18FEB] Cow Gymnasts P
lg4183 [USACO18JAN] Cow at Large P
lg4184 [USACO18JAN] Sprinklers P
lg4081 [USACO17DEC] Standing Out from the Herd P
lg4082 [USACO17DEC] Push a Box P
lg3665 [USACO17OPEN] Switch Grass P
lg3666 [USACO17OPEN] COWBASIC P
lg3658 [USACO17FEB] Why Did the Cow Cross the Road III P
lg3607 [USACO17JAN] Subsequence Reversal P.
lg2541 [USACO16DEC] Robotic Cow Herd P
lg6173 [USACO16FEB] Circular Barn P
lg6176 [USACO16JAN] Lights Out P
⚫ NOI/NOI+/CTS
lg14985 [USACO26JAN1] Pluses and Minuses P
lg15264 [USACO26JAN2] Cow Circle P
lg15265 [USACO26JAN2] Dynamic Instability P
lg15580 [USACO26FEB] Blast Damage P
lg12033 [USACO25OPEN] Package Pickup P
lg11846 [USACO25FEB] Transforming Pairs P
lg11677 [USACO25JAN] Shock Wave P
lg11678 [USACO25JAN] Watering the Plants P
lg11460 [USACO24DEC] Maximize Minimum Difference P
lg10197 [USACO24FEB] Minimum Sum of Maximums P
lg10198 [USACO24FEB] Infinite Adventure P
lg10140 [USACO24JAN] Island Vacation P
lg9983 [USACO23DEC] Cowntact Tracing P
lg9194 [USACO23OPEN] Triples of Cows P
lg8275 [USACO22OPEN] 262144 Revisited P
lg8276 [USACO22OPEN] Hoof and Brain P
lg8192 [USACO22FEB] Paint by Rectangles P
lg8194 [USACO22FEB] Phone Numbers P
lg7531 [USACO21OPEN] Routing Schemes P
lg7417 [USACO21FEB] Minimizing Edges P
lg7418 [USACO21FEB] Counting Graphs P
lg7294 [USACO21JAN] Minimum Cost Paths P
lg7155 [USACO20DEC] Spaceship P
lg7156 [USACO20DEC] Cowmistry P
lg6276 [USACO20OPEN] Exercise P
lg6277 [USACO20OPEN] Circus P
lg5853 [USACO19DEC] Tree Depth P
lg5422 [USACO19OPEN] Compound Escape P
lg5423 [USACO19OPEN] Valleys P
lg5244 [USACO19FEB] Mowing Mischief P
lg4373 [USACO18OPEN] Train Tracking P
lg3148 [USACO16OPEN] Bull in a China Shop P
章节 1. USACO 历年题目
开放
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| lg3135 【动态规划：区间一维一边推】最大子矩阵2️⃣[USACO16JAN] Fort Moo P | 16 | 10 | 7 |
| lg4271 D59 树的直径 树上前缀和[USACO18FEB] New Barns P | 3 | 1 | 10 |
| lg3657 [USACO17FEB] Why Did the Cow Cross the Road II P | 2 | 1 | 10 |
| lg5202 [USACO19JAN] Redistricting P | 1 | 1 | 10 |
| lg2098 [USACO16DEC] Team Building P | 1 | 1 | 10 |
| lg3128 A11*【树上点差分】树上路径修改和点查询1[USACO15DEC] Max Flow P | 29 | 19 | 3 |
| lg3130 C02*【线段树】一维区间修改+区间询问[USACO15DEC] Counting Haybale P | 278 | 40 | 8 |
| lg12031 [USACO25OPEN] Forklift Certified P | 18 | 3 | 9 |
| lg11676 [USACO25JAN] DFS Order P | 8 | 3 | 10 |
| lg8907 [USACO22DEC] Making Friends P | 21 | 6 | 8 |
| lg7530 [USACO21OPEN] United Cows of Farmer John P | 77 | 10 | 8 |
| lg7416 [USACO21FEB] No Time to Dry P | 28 | 8 | 7 |
| lg6275 [USACO20OPEN] Sprinklers 2: Return of the Alfalfa P | 24 | 10 | 6 |
| lg6142 [USACO20FEB] Delegation P | 32 | 10 | 7 |
| lg6143 [USACO20FEB] Equilateral Triangles P | 33 | 9 | 7 |
| lg5851 [USACO19DEC] Greedy Pie Eaters P | 2 | 2 | 10 |
| lg5852 [USACO19DEC] Bessie's Snow Cow P | 1 | 1 | 10 |
| lg4374 [USACO18OPEN] Disruption P | 1 | 1 | 10 |
| lg4090 A38 贪心算法 [USACO17DEC] Greedy Gift Takers P | 132 | 29 | 7 |
| lg3664 [USACO17OPEN] Modern Art P | 1 | 1 | 10 |
| lg3656 *【树状数组】最少交叉[USACO17FEB] Why Did the Cow Cross the Road I P | 11 | 1 | 10 |
| lg3605 C87【树状数组+DFS】统计子树i中点权比wi大的点数[USACO17JAN] Promotion Counting P | 58 | 24 | 5 |
| lg3606 [USACO17JAN] Building a Tall Barn P | 1 | 1 | 10 |
| lg3147 [USACO16OPEN] 262144 P | 12 | 9 | 8 |
| lg2748 [USACO16OPEN] Landscaping P | 1 | 1 | 10 |
| lg6172 [USACO16FEB] Load Balancing P | 2 | 1 | 10 |
| lg3141 D138 [USACO16FEB] Fenced In P | 12 | 1 | 10 |
| lg3129 *【模拟+set】[USACO15DEC] High Card Low Card P | 7 | 4 | 10 |
| lg1715 [USACO16DEC] Lots of Triangles P | 1 | 1 | 10 |
| lg9984 [USACO23DEC] A Graph Problem P | 7 | 3 | 10 |
| lg9130 [USACO23FEB] Hungry Cow P | 21 | 6 | 8 |
| lg9019 [USACO23JAN] Tractor Paths P | 20 | 7 | 8 |
| lg8906 [USACO22DEC] Breakdown P | 18 | 6 | 8 |
| lg7293 [USACO21JAN] Sum of Distances P | 29 | 5 | 8 |
| lg7154 [USACO20DEC] Sleeping Cows P | 40 | 9 | 7 |
| lg6008 [USACO20JAN] Cave Paintings P | 30 | 10 | 6 |
| lg5242 [USACO19FEB] Cow Dating P | 5 | 2 | 10 |
| lg5155 [USACO18DEC] Balance Beam P | 1 | 1 | 10 |
| lg4182 [USACO18JAN] Lifeguards P | 4 | 3 | 10 |
| lg3136 [USACO16JAN] Mowing the Field P | 3 | 1 | 10 |
| lg16572 [USACO26OPEN] Arranging Cows | 1 | 1 | 10 |
| lg16573 [USACO26OPEN] Haybale Stacks | 4 | 1 | 10 |
| lg16574 [USACO26OPEN] Perfect Binary Trees | 1 | 1 | 10 |
| lg14983 [USACO26JAN1] Hoof, Paper, Scissors Triples P | 3 | 1 | 10 |
| lg14984 [USACO26JAN1] Lineup Counting Queries P | 3 | 1 | 10 |
| lg15263 [USACO26JAN2] Circle of Cows P | 2 | 1 | 10 |
| lg15579 [USACO26FEB] All Pairs Shortest Paths P | 1 | 1 | 10 |
| lg15581 [USACO26FEB] Min Max Subarrays II P | 1 | 1 | 10 |
| lg12032 [USACO25OPEN] Lazy Sort P | 25 | 2 | 9 |
| lg11845 [USACO25FEB] Min Max Subarrays P | 16 | 3 | 9 |
| lg11847 [USACO25FEB] True or False Test P | 9 | 2 | 10 |
| lg11458 [USACO24DEC] All Pairs Similarity P | 12 | 3 | 9 |
| lg11459 [USACO24DEC] It's Mooin' Time P | 10 | 3 | 10 |
| lg10283 [USACO24OPEN] Identity Theft P | 24 | 6 | 8 |
| lg10284 [USACO24OPEN] Splitting Haybales P | 22 | 5 | 8 |
| lg10285 [USACO24OPEN] Activating Robots P | 39 | 3 | 9 |
| lg10196 [USACO24FEB] Lazy Cow P | 38 | 4 | 9 |
| lg10141 [USACO24JAN] Merging Cells P | 13 | 3 | 9 |
| lg10142 [USACO24JAN] Mooball Teams III P | 24 | 6 | 8 |
| lg9985 [USACO23DEC] Train Scheduling P | 10 | 3 | 10 |
| lg9192 [USACO23OPEN] Pareidolia P | 10 | 4 | 9 |
| lg9193 [USACO23OPEN] Good Bitstrings P | 5 | 5 | 10 |
| lg9131 [USACO23FEB] Problem Setting P | 16 | 5 | 8 |
| lg9132 [USACO23FEB] Watching Cowflix P | 19 | 4 | 9 |
| lg9020 [USACO23JAN] Mana Collection P | 33 | 6 | 8 |
| lg9021 [USACO23JAN] Subtree Activation P | 52 | 9 | 8 |
| lg8908 [USACO22DEC] Palindromes P | 23 | 6 | 8 |
| lg8277 [USACO22OPEN] Up Down Subsequence P | 10 | 4 | 9 |
| lg8193 [USACO22FEB] Sleeping in Class P | 158 | 7 | 9 |
| lg8099 [USACO22JAN] Minimizing Haybales P | 12 | 5 | 9 |
| lg8100 [USACO22JAN] Counting Haybales P | 12 | 10 | 8 |
| lg8101 [USACO22JAN] Multiple Choice Test P | 19 | 6 | 8 |
| lg7984 [USACO21DEC] Tickets P | 4 | 3 | 10 |
| lg7985 [USACO21DEC] Paired Up P | 4 | 3 | 10 |
| lg7986 [USACO21DEC] HILO P | 4 | 2 | 10 |
| lg7532 [USACO21OPEN] Balanced Subsets P | 46 | 8 | 8 |
| lg7295 [USACO21JAN] Paint by Letters P | 12 | 2 | 10 |
| lg6144 [USACO20FEB] Help Yourself P | 46 | 8 | 8 |
| lg6009 [USACO20JAN] Non-Decreasing Subsequences P | 35 | 8 | 7 |
| lg6010 [USACO20JAN] Falling Portals P | 59 | 8 | 8 |
| lg5243 [USACO19FEB] Moorio Kart P | 6 | 2 | 10 |
| lg5203 [USACO19JAN] Exercise Route P | 13 | 6 | 8 |
| lg5204 [USACO19JAN] Train Tracking 2 P | 3 | 2 | 10 |
| lg5156 [USACO18DEC] Sort It Out P | 7 | 3 | 10 |
| lg5157 [USACO18DEC] The Cow Gathering P | 1 | 1 | 10 |
| lg4372 [USACO18OPEN] Out of Sorts P | 1 | 1 | 10 |
| lg4088 [USACO18FEB] Slingshot P | 1 | 1 | 10 |
| lg4270 [USACO18FEB] Cow Gymnasts P | 1 | 1 | 10 |
| lg4183 [USACO18JAN] Cow at Large P | 1 | 1 | 10 |
| lg4184 [USACO18JAN] Sprinklers P | 1 | 1 | 10 |
| lg4081 [USACO17DEC] Standing Out from the Herd P | 9 | 2 | 10 |
| lg4082 [USACO17DEC] Push a Box P | 1 | 1 | 10 |
| lg3665 [USACO17OPEN] Switch Grass P | 3 | 2 | 10 |
| lg3666 [USACO17OPEN] COWBASIC P | 1 | 1 | 10 |
| lg3658 [USACO17FEB] Why Did the Cow Cross the Road III P | 1 | 1 | 10 |
| lg3607 [USACO17JAN] Subsequence Reversal P. | 1 | 1 | 10 |
| lg2541 [USACO16DEC] Robotic Cow Herd P | 1 | 1 | 10 |
| lg6173 [USACO16FEB] Circular Barn P | 6 | 1 | 10 |
| lg6176 [USACO16JAN] Lights Out P | 3 | 1 | 10 |
| lg14985 [USACO26JAN1] Pluses and Minuses P | 5 | 2 | 10 |
| lg15264 [USACO26JAN2] Cow Circle P | 3 | 1 | 10 |
| lg15265 [USACO26JAN2] Dynamic Instability P | 3 | 1 | 10 |
| lg15580 [USACO26FEB] Blast Damage P | 1 | 1 | 10 |
| lg12033 [USACO25OPEN] Package Pickup P | 5 | 1 | 10 |
| lg11846 [USACO25FEB] Transforming Pairs P | 5 | 1 | 10 |
| lg11677 [USACO25JAN] Shock Wave P | 1 | 1 | 10 |
| lg11678 [USACO25JAN] Watering the Plants P | 4 | 1 | 10 |
| lg11460 [USACO24DEC] Maximize Minimum Difference P | 8 | 1 | 10 |
| lg10197 [USACO24FEB] Minimum Sum of Maximums P | 13 | 2 | 9 |
| lg10198 [USACO24FEB] Infinite Adventure P | 4 | 2 | 10 |
| lg10140 [USACO24JAN] Island Vacation P | 14 | 2 | 9 |
| lg9983 [USACO23DEC] Cowntact Tracing P | 5 | 2 | 10 |
| lg9194 [USACO23OPEN] Triples of Cows P | 5 | 3 | 10 |
| lg8275 [USACO22OPEN] 262144 Revisited P | 21 | 2 | 9 |
| lg8276 [USACO22OPEN] Hoof and Brain P | 10 | 5 | 9 |
| lg8192 [USACO22FEB] Paint by Rectangles P | 56 | 6 | 9 |
| lg8194 [USACO22FEB] Phone Numbers P | 44 | 4 | 9 |
| lg7531 [USACO21OPEN] Routing Schemes P | 23 | 4 | 8 |
| lg7417 [USACO21FEB] Minimizing Edges P | 19 | 4 | 9 |
| lg7418 [USACO21FEB] Counting Graphs P | 12 | 3 | 9 |
| lg7294 [USACO21JAN] Minimum Cost Paths P | 62 | 4 | 9 |
| lg7155 [USACO20DEC] Spaceship P | 29 | 4 | 9 |
| lg7156 [USACO20DEC] Cowmistry P | 24 | 4 | 9 |
| lg6276 [USACO20OPEN] Exercise P | 21 | 6 | 8 |
| lg6277 [USACO20OPEN] Circus P | 21 | 6 | 8 |
| lg5853 [USACO19DEC] Tree Depth P | 2 | 2 | 10 |
| lg5422 [USACO19OPEN] Compound Escape P | 1 | 1 | 10 |
| lg5423 [USACO19OPEN] Valleys P | 1 | 1 | 10 |
| lg5244 [USACO19FEB] Mowing Mischief P | 1 | 1 | 10 |
| lg4373 [USACO18OPEN] Train Tracking P | 1 | 1 | 10 |
| lg3148 [USACO16OPEN] Bull in a China Shop P | 1 | 1 | 10 |