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这题……我单用Tarjan算法居然可以过本来以为有并查集和LCA。 结果写了这两个是RE的。 最后去掉了这两个优化，该用LCA的地方用1（根）代替了。 没想到居然能AC，还是比较快的（344MS）…… Followed by: Post your reply here: |
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