mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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175 lines
17 KiB
JSON
175 lines
17 KiB
JSON
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"questionId": "2455",
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"title": "Node With Highest Edge Score",
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"content": "<p>You are given a directed graph with <code>n</code> nodes labeled from <code>0</code> to <code>n - 1</code>, where each node has <strong>exactly one</strong> outgoing edge.</p>\n\n<p>The graph is represented by a given <strong>0-indexed</strong> integer array <code>edges</code> of length <code>n</code>, where <code>edges[i]</code> indicates that there is a <strong>directed</strong> edge from node <code>i</code> to node <code>edges[i]</code>.</p>\n\n<p>The <strong>edge score</strong> of a node <code>i</code> is defined as the sum of the <strong>labels</strong> of all the nodes that have an edge pointing to <code>i</code>.</p>\n\n<p>Return <em>the node with the highest <strong>edge score</strong></em>. If multiple nodes have the same <strong>edge score</strong>, return the node with the <strong>smallest</strong> index.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n<img src=\"https://assets.leetcode.com/uploads/2022/06/20/image-20220620195403-1.png\" style=\"width: 450px; height: 260px;\" />\n<pre>\n<strong>Input:</strong> edges = [1,0,0,0,0,7,7,5]\n<strong>Output:</strong> 7\n<strong>Explanation:</strong>\n- The nodes 1, 2, 3 and 4 have an edge pointing to node 0. The edge score of node 0 is 1 + 2 + 3 + 4 = 10.\n- The node 0 has an edge pointing to node 1. The edge score of node 1 is 0.\n- The node 7 has an edge pointing to node 5. The edge score of node 5 is 7.\n- The nodes 5 and 6 have an edge pointing to node 7. The edge score of node 7 is 5 + 6 = 11.\nNode 7 has the highest edge score so return 7.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n<img src=\"https://assets.leetcode.com/uploads/2022/06/20/image-20220620200212-3.png\" style=\"width: 150px; height: 155px;\" />\n<pre>\n<strong>Input:</strong> edges = [2,0,0,2]\n<strong>Output:</strong> 0\n<strong>Explanation:</strong>\n- The nodes 1 and 2 have an edge pointing to node 0. The edge score of node 0 is 1 + 2 = 3.\n- The nodes 0 and 3 have an edge pointing to node 2. The edge score of node 2 is 0 + 3 = 3.\nNodes 0 and 2 both have an edge score of 3. Since node 0 has a smaller index, we return 0.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>n == edges.length</code></li>\n\t<li><code>2 <= n <= 10<sup>5</sup></code></li>\n\t<li><code>0 <= edges[i] < n</code></li>\n\t<li><code>edges[i] != i</code></li>\n</ul>\n",
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"hints": [
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"Create an array arr where arr[i] is the edge score for node i.",
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"How does the edge score for node edges[i] change? It increases by i.",
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"The edge score may not fit within a standard 32-bit integer."
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],
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