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Starting with an undirected graph (the "original graph") with nodes from 0 to N-1, subdivisions are made to some of the edges. The graph is given as f 阅读全文
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A car travels from a starting position to a destination which is target miles east of the starting position. Along the way, there are gas stations. Ea 阅读全文
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965. Univalued Binary Tree A binary tree is univalued if every node in the tree has the same value. Return true if and only if the given tree is univa 阅读全文