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题目描述 如题，现在有一个并查集，你需要完成合并和查询操作。 输入输出格式 输入格式： 第一行包含两个整数N、M，表示共有N个元素和M个操作。 接下来M行，每行包含三个整数Zi、Xi、Yi 当Zi=1时，将Xi与Yi所在的集合合并 当Zi=2时，输出Xi与Yi是否在同一集合内，是的话输出Y；否则话输 阅读全文
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题目描述 Like everyone else, FJ is always thinking up ways to increase his revenue. To this end, he has set up a series of tolls that the cows will pay wh 阅读全文
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题目描述 Farmer John wants the cows to prepare for the county jumping competition, so Bessie and the gang are practicing jumping over hurdles. They are ge 阅读全文
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题目背景 [Usaco2008 Jan] 题目描述 N (1 ≤ N ≤ 100) cows, conveniently numbered 1..N, are participating in a programming contest. As we all know, some cows code 阅读全文
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题目描述 Farmer John is on a boat seeking fabled treasure on one of the N (1 <= N <= 100) islands conveniently labeled 1..N in the Cowribbean Sea. The tre 阅读全文