261. Graph Valid Tree
boolean validTree(int n, int[][] edges);n = 5
edges = [[0,1], [0,2], [0,3], [1,4]]n = 5
edges = [[0,1],[1,2],[2,3],[1,3],[1,4]]Previous323. Number of Connected Components in an Undirected Graph (M)Next1135. Connecting Cities With Minimum Cost
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