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wa到无语。。。。。。。。。。。。。。我用dijk + sort + dp。。。。。。。能过test和在网上找的test。。 合法路径的两个点dis[i]和dis[j]可以相等么。。。。这点好模糊。感觉是不可以的。。。。 但是两个都试过了还是wa Followed by:
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