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http://poj.org/problem?id=1112和这个题有一些像。In Reply To:类似于2SAT的思想，这儿是无向图，可以直接用并查集来搞，利用对偶关系，贪心即可。1A Posted by:yygy at 2014-07-10 19:55:33 Followed by: Post your reply here: |
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