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超大背包问题 有重量和价值分别为w(i),v(i)的n个物品,从这些物品中选出总重不超过W的物品,求所有挑选方案中价值总和的最大值1ps[j].second时我们一定不会选择第j种方案了,所以可以去掉。之后我们就继续把剩余物品的选择情况枚举出来,每枚举出来一种方案,让... 阅读全文
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Physics ExperimentTime Limit: 1000MSMemory Limit: 65536KDescriptionSimon is doing a physics experiment with N identicalballs with the... 阅读全文
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4 Values whose Sum is 0Time Limit: 15000MSMemory Limit: 228000KCase Time Limit: 5000MSDescriptionThe SUM problemcan be formulated as f... 阅读全文
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Face The Right WayTime Limit: 2000MSMemory Limit: 65536KDescriptionFarmer John has arranged his N (1≤ N ≤ 5,000) cows in a row and man... 阅读全文
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FliptileTime Limit: 2000MSMemory Limit: 65536KDescriptionFarmer John knows that an intellectuallysatisfied cow is a happy cow who will... 阅读全文