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https://gitee.com/coder-xiaomo/leetcode-problemset
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"difficulty": "Medium",
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"likes": 2350,
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"similarQuestions": "[{\"title\": \"Course Schedule\", \"titleSlug\": \"course-schedule\", \"difficulty\": \"Medium\", \"translatedTitle\": null}, {\"title\": \"Number of Connected Components in an Undirected Graph\", \"titleSlug\": \"number-of-connected-components-in-an-undirected-graph\", \"difficulty\": \"Medium\", \"translatedTitle\": null}, {\"title\": \"Keys and Rooms\", \"titleSlug\": \"keys-and-rooms\", \"difficulty\": \"Medium\", \"translatedTitle\": null}]",
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"exampleTestcases": "5\n[[0,1],[0,2],[0,3],[1,4]]\n5\n[[0,1],[1,2],[2,3],[1,3],[1,4]]",
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@@ -46,7 +46,7 @@
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],
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"hints": [
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"Given <code>n = 5</code> and <code>edges = [[0, 1], [1, 2], [3, 4]]</code>, what should your return? Is this case a valid tree?",
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"According to the <a href=\"https://en.wikipedia.org/wiki/Tree_(graph_theory)\" target=\"_blank\">definition of tree on Wikipedia</a>: “a tree is an undirected graph in which any two vertices are connected by <i>exactly</i> one path. In other words, any connected graph without simple cycles is a tree.”"
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