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并查集就是好用。。。不过还是wa了一次。。。输出注意点，两个case之间有空格，因为这个还PE了。。。并查集就是好用。。。不过还是wa了一次。。。输出注意点，两个case之间有空格，因为这个还PE了。。。 Followed by: Post your reply here: |
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