mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-01-11 02:58:13 +08:00
198 lines
20 KiB
JSON
198 lines
20 KiB
JSON
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"boundTopicId": 910434,
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"title": "省份数量",
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"titleSlug": "bLyHh0",
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"translatedTitle": "省份数量",
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"translatedContent": "<div class=\"original__bRMd\">\n<p>有 <code>n</code> 个城市，其中一些彼此相连，另一些没有相连。如果城市 <code>a</code> 与城市 <code>b</code> 直接相连，且城市 <code>b</code> 与城市 <code>c</code> 直接相连，那么城市 <code>a</code> 与城市 <code>c</code> 间接相连。</p>\n\n<p><strong>省份</strong> 是一组直接或间接相连的城市，组内不含其他没有相连的城市。</p>\n\n<p>给你一个 <code>n x n</code> 的矩阵 <code>isConnected</code> ，其中 <code>isConnected[i][j] = 1</code> 表示第 <code>i</code> 个城市和第 <code>j</code> 个城市直接相连，而 <code>isConnected[i][j] = 0</code> 表示二者不直接相连。</p>\n\n<p>返回矩阵中 <strong>省份</strong> 的数量。</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/12/24/graph1.jpg\" />\n<pre>\n<strong>输入：</strong>isConnected = [[1,1,0],[1,1,0],[0,0,1]]\n<strong>输出：</strong>2\n</pre>\n\n<p><strong>示例 2：</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/12/24/graph2.jpg\" />\n<pre>\n<strong>输入：</strong>isConnected = [[1,0,0],[0,1,0],[0,0,1]]\n<strong>输出：</strong>3\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 <= n <= 200</code></li>\n\t<li><code>n == isConnected.length</code></li>\n\t<li><code>n == isConnected[i].length</code></li>\n\t<li><code>isConnected[i][j]</code> 为 <code>1</code> 或 <code>0</code></li>\n\t<li><code>isConnected[i][i] == 1</code></li>\n\t<li><code>isConnected[i][j] == isConnected[j][i]</code></li>\n</ul>\n</div>\n\n<p> </p>\n\n<p><meta charset=\"UTF-8\" />注意：本题与主站 547 题相同： <a href=\"https://leetcode-cn.com/problems/number-of-provinces/\">https://leetcode-cn.com/problems/number-of-provinces/</a></p>\n",
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