USACO Silver白银组近年真题与题解

USACO Silver近年真题与题解

这里收录了近几年USACO Silver白银组的真题，按赛季分类，主要提供原创的中文题解、代码、算法标签，及参考难度评级。相比其他中文题解，我们注重风格的统一性，和代码的清晰易读；相比英文官方题解，我们力求让内容对国内学员更易于理解和阅读。

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2024-2025赛季

2025 US Open Contest, Silver (750分晋级)

习题
P12025USACO SilverSequence Construction2025普及+/提高解答
算法标签Construction
P12026USACO SilverCompatible Pairs2025普及+/提高解答
算法标签Graph, greedy, topology sort
P12027USACO SilverSki Slope2025普及+/提高解答
算法标签Adhoc

2025 FEB Contest, Silver (700分晋级)

习题
P11839USACO SilverThe Best Lineup2025普及+/提高解答
算法标签Simulation, greedy
P11840USACO SilverVocabulary Quiz2025普及+/提高解答
算法标签Tree
P11841USACO SilverTransforming Pairs2025普及/提高-解答
算法标签Greedy, number theory

2025 JAN Contest, Silver (700分晋级)

习题
P11670USACO SilverCow Checkups2025普及+/提高解答
算法标签Prefix sum
P11671USACO SilverFarmer John's Favorite Operation2025普及+/提高解答
算法标签Prefix sum
P11672USACO SilverTable Recovery2025提高+/省选-解答
算法标签Adhoc

2024 DEC Contest, Silver (700分晋级)

习题
P11452USACO SilverCake Game2024普及/提高-解答
算法标签Game, prefix sum
P11453USACO SilverDeforestation2024普及+/提高解答
算法标签Greedy, binary search, priority queue
P11454USACO Silver2D Conveyor Belt2024提高+/省选-解答
算法标签Graph

2023-2024赛季

2024 US Open Contest, Silver (650分晋级)

习题
P10277USACO SilverBessie's Interview2024普及+/提高解答
算法标签Priority queue, graph
P10278USACO SilverPainting Fence Posts2024提高+/省选-解答
算法标签Graph, differential
P10279USACO SilverThe 'Winning' Gene2024提高+/省选-解答
算法标签Hash, monotonic stack

2024 FEB Contest, Silver (750分晋级)

习题
P10190USACO SilverTarget Practice II2024提高+/省选-解答
算法标签Math, binary search
P10191USACO SilverTest Tubes2024提高+/省选-解答
算法标签Simulation, greedy
P10192USACO SilverMoorbles2024普及+/提高解答
算法标签DP, greedy

2024 JAN Contest, Silver (750分晋级)

习题
P10134USACO SilverCowmpetency2024普及+/提高解答
算法标签Adhoc
P10135USACO SilverPotion Farming2024普及/提高-解答
算法标签Tree, DP
P10136USACO SilverCowlendar2024普及+/提高解答
算法标签Number theory

2023 DEC Contest, Silver (750分晋级)

习题
P9977USACO SilverBovine Acrobatics2023普及+/提高解答
算法标签Adhoc
P9978USACO SilverCycle Correspondence2023普及/提高-解答
算法标签Graph
P9979USACO SilverTarget Practice2023普及+/提高解答
算法标签Simulation

2022-2023赛季

2023 US Open Contest, Silver (750分晋级)

习题
P9186USACO SilverMilk Sum2023普及+/提高解答
算法标签Prefix sum
P9187USACO SilverField Day2023普及+/提高解答
算法标签BFS, shortest path
P9188USACO SilverPareidolia2023普及+/提高解答
算法标签DP

2023 FEB Contest, Silver (700分晋级)

习题
P9124USACO SilverBakery2023普及+/提高解答
算法标签Binary search
P9125USACO SilverCow-libi2023普及/提高-解答
算法标签Binary search
P9126USACO SilverMoo Route II2023普及+/提高解答
算法标签Graph

2023 JAN Contest, Silver (700分晋级)

习题
P9013USACO SilverFind and Replace2023提高+/省选-解答
算法标签Greedy, 基环树
P9014USACO SilverFollowing Directions2023普及/提高-解答
算法标签DFS
P9015USACO SilverMoo Route2023普及/提高-解答
算法标签Greedy

2022 DEC Contest, Silver (750分晋级)

习题
P8900USACO SilverBarn Tree2022普及+/提高解答
算法标签Greedy, construction
P8901USACO SilverCircular Barn2022普及+/提高解答
算法标签Game, prime sieve
P8902USACO SilverRange Reconstruction2022普及+/提高解答
算法标签Construction

2021-2022赛季

2022 US Open Contest, Silver (800分晋级)

习题
P8269USACO SilverVisits2022普及+/提高解答
算法标签Topology sort, SCC, 基环树
P8270USACO SilverSubset Equality2022提高+/省选-解答
算法标签Enumeration
P8271USACO SilverCOW Operations2022普及+/提高解答
算法标签Prefix sum

2022 FEB Contest, Silver (650分晋级)

习题
P8186USACO SilverRedistributing Gifts2022普及+/提高解答
算法标签Graph, bitset, Floyd algorithm
P8187USACO SilverRobot Instructions2022提高+/省选-
算法标签Meet in the middle
P8188USACO SilverEmail Filing2022普及+/提高
算法标签Simulation, greedy

2022 JAN Contest, Silver (750分晋级)

习题
P8093USACO SilverSearching for Soulmates2022普及+/提高解答
算法标签Math, greedy, number system
P8094USACO SilverCow Frisbee2022普及/提高-
算法标签Monotonic stack
P8095USACO SilverCereal 22022提高+/省选-
算法标签Graph, network stream, construction

2021 DEC Contest, Silver (700分晋级)

习题
P7990USACO SilverClosest Cow Wins2021提高+/省选-解答
算法标签Greedy
P7991USACO SilverConnecting Two Barns2021普及+/提高解答
算法标签Binary search, DSU
P7992USACO SilverConvoluted Intervals2021普及/提高-
算法标签Math, prefix sum, differentials

2020-2021赛季

2021 US Open Contest, Silver (750分晋级)

习题
P7555USACO SilverMaze Tac Toe2021普及+/提高
算法标签Memoization, number system
P7556USACO SilverDo You Know Your ABCs?2021普及/提高-
算法标签分类讨论
P7557USACO SilverAcowdemia2021普及/提高-
算法标签Binary search

2021 FEB Contest, Silver (800分晋级)

习题
P7411USACO SilverComfortable Cows2021普及+/提高解答
算法标签Flood fill
P7412USACO SilverYear of the Cow2021普及/提高-
算法标签Math, greedy
P7410USACO SilverJust Green Enough2021普及+/提高
算法标签Enumeration

2021 JAN Contest, Silver (800分晋级)

习题
P7299USACO SilverDance Mooves2021普及+/提高
算法标签DSU
P7300USACO SilverNo Time to Paint2021普及/提高-
算法标签Prefix sum
P7301USACO SilverSpaced Out2021普及+/提高
算法标签Math, greedy

2020 DEC Contest, Silver (800分晋级)

习题
P7148USACO SilverCowntagion2020普及/提高-解答
算法标签Math, greedy
P7149USACO SilverRectangular Pasture2020普及+/提高解答
算法标签Discretization, sort, prefix sum
P7150USACO SilverStuck in a Rut2020普及+/提高解答
算法标签Greedy, prefix sum, sort