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【Codeforces】[371C]Hamburgers

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【Codeforces】[348A]Mafia

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【Codeforces】[372A]Counting Kangaroos is Fun

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【Codeforces】[670D2]Magic Powder - 2

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【Codeforces】[448D]Multiplication Table

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【杭电】[4907]Task schedule

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【NBUT】[1651]Red packet

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【LightOJ】[1137]Expanding Rods

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【LightOJ】[1062]Crossed Ladders

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【杭电】[4004]The Frog's Games

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【杭电】[2141]Can you find it?

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【POJ】[1064]Cable master

知识汇总

二分查找——与答案进行比较的思维

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【杭电】[1254]推箱子

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【杭电】[2199]Can you solve this equation?