2009 年暑假集训讲义 上海交通大学 马融
2009 年暑假集训讲义
上海交通大学 马融
第一讲 穷举与贪心 ................................................................................................................... 3
集市班车 (Fair Shuttle, USACO 2009 Feb) ............................................................................... 4
翻转棋 (Fliptile, USACO 2007 Nov) .......................................................................................... 5
翻转奶牛 (Face The Right Way, USACO 2007 Mar) ................................................................. 6
第二讲 背包问题 ....................................................................................................................... 7
分数膨胀 (Score Inflation, USACO 3.1) .................................................................................... 8
货币系统 (Money Systems, USACO 2.3) .................................................................................. 9
奶牛博览会 (Cow Exhibition, USACO 2003 Nov) ................................................................... 10
太空电梯 (Space Elevator, USACO 2005 Mar) ....................................................................... 11
牛奶量取 (Milk Measuring, USACO 5.3) ................................................................................ 12
第三讲 动态规划选讲 ............................................................................................................. 13
抓苹果 (Apple Catching, USACO 2004 Nov) .......................................................................... 15
最廉回文 (Cheapest Palindrome, USACO 2007 Open) .......................................................... 17
麦香牛块 (Beef McNuggets, USACO 4.1) .............................................................................. 19
道路重建 (Rebuilding Roads, USACO Feb 2002).................................................................... 20
第四讲 最小生成树问题 ......................................................................................................... 22
建造道路 (Building Roads, USACO 2007 Dec) ....................................................................... 23
安慰奶牛 (Cheering up the Cows, USACO 2008 Nov) ........................................................... 24
地震 (Earthquake, USACO 2001 Open) .................................................................................. 26
第五讲 最短路径问题 ............................................................................................................. 28
道路翻新 (Revamping Trails, USACO 2009 Feb) .................................................................... 29
道路障碍 (Roadblocks, USACO 2006 Nov) ............................................................................ 31
奶牛慢跑 (Cow Jogging, USACO 2008 Mar) .......................................................................... 33
第六讲 广度优先遍历 ............................................................................................................. 35
青铜莲花池 (Bronze Lilypad Pond, USACO 2007 Feb) ........................................................... 36
白银莲花池 (Silver Lilypad Pond, USACO 2007 Feb) ............................................................. 37
黄金莲花池 (Lilypad Pond, USACO 2007 Feb) ....................................................................... 39
第七讲 USACO 竞赛试题选讲 ................................................................................................ 41
哞哞大学之奖学金 (Moo University - Financial Aid, USACO 2004 Mar) .............................. 42
哞哞大学之校队选拔 (Moo University - Team Tryouts, USACO 2004 Mar) ......................... 44
哞哞大学之匹萨预定 (Moo University - Emergency Pizza Order, USACO 2004 Mar) .......... 46
第八讲 USACO 竞赛试题选讲(续) .................................................................................... 48
黄金平衡 (USACO 2007 Mar) ................................................................................................ 49
奶牛排名 (Ranking the Cows, USACO 2007 Mar) .................................................................. 50
奶牛交通 (Cow Traffic, USACO 2007 Mar)............................................................................. 51
校庆聚会 (Ural 1039)............................................................................................................. 52
第九讲 线段树 ......................................................................................................................... 54
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