leetcode-problemset/leetcode-cn/originData/count-beautiful-splits-in-an-array.json

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            "title": "Count Beautiful Splits in an Array",
            "titleSlug": "count-beautiful-splits-in-an-array",
            "content": "<p>You are given an array <code>nums</code>.</p>\n\n<p>A split of an array <code>nums</code> is <strong>beautiful</strong> if:</p>\n\n<ol>\n\t<li>The array <code>nums</code> is split into three <span data-keyword=\"subarray-nonempty\">subarrays</span>: <code>nums1</code>, <code>nums2</code>, and <code>nums3</code>, such that <code>nums</code> can be formed by concatenating <code>nums1</code>, <code>nums2</code>, and <code>nums3</code> in that order.</li>\n\t<li>The subarray <code>nums1</code> is a <span data-keyword=\"array-prefix\">prefix</span> of <code>nums2</code> <strong>OR</strong> <code>nums2</code> is a <span data-keyword=\"array-prefix\">prefix</span> of <code>nums3</code>.</li>\n</ol>\n\n<p>Return the <strong>number of ways</strong> you can make this split.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">nums = [1,1,2,1]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">2</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>The beautiful splits are:</p>\n\n<ol>\n\t<li>A split with <code>nums1 = [1]</code>, <code>nums2 = [1,2]</code>, <code>nums3 = [1]</code>.</li>\n\t<li>A split with <code>nums1 = [1]</code>, <code>nums2 = [1]</code>, <code>nums3 = [2,1]</code>.</li>\n</ol>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">nums = [1,2,3,4]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">0</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>There are 0 beautiful splits.</p>\n</div>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= nums.length &lt;= 5000</code></li>\n\t<li><code><font face=\"monospace\">0 &lt;= nums[i] &lt;= 50</font></code></li>\n</ul>\n",
            "translatedTitle": "统计数组中的美丽分割",
            "translatedContent": "<p>给你一个整数数组&nbsp;<code>nums</code>&nbsp;。</p>\n\n<p>如果数组&nbsp;<code>nums</code>&nbsp;的一个分割满足以下条件，我们称它是一个 <strong>美丽</strong>&nbsp;分割：</p>\n\n<ol>\n\t<li>数组&nbsp;<code>nums</code>&nbsp;分为三段 <span data-keyword=\"subarray-nonempty\">非空子数组</span>：<code>nums1</code>&nbsp;，<code>nums2</code>&nbsp;和&nbsp;<code>nums3</code>&nbsp;，三个数组&nbsp;<code>nums1</code>&nbsp;，<code>nums2</code>&nbsp;和&nbsp;<code>nums3</code>&nbsp;按顺序连接可以得到 <code>nums</code>&nbsp;。</li>\n\t<li>子数组&nbsp;<code>nums1</code>&nbsp;是子数组&nbsp;<code>nums2</code>&nbsp;的 <span data-keyword=\"array-prefix\">前缀</span> <strong>或者</strong>&nbsp;<code>nums2</code>&nbsp;是&nbsp;<code>nums3</code>&nbsp;的 <span data-keyword=\"array-prefix\">前缀</span>。</li>\n</ol>\n\n<p>请你返回满足以上条件的分割 <strong>数目</strong>&nbsp;。</p>\n\n<p><strong>子数组</strong>&nbsp;指的是一个数组里一段连续 <strong>非空</strong>&nbsp;的元素。</p>\n\n<p><strong>前缀</strong>&nbsp;指的是一个数组从头开始到中间某个元素结束的子数组。</p>\n\n<p>&nbsp;</p>\n\n<p><strong class=\"example\">示例 1：</strong></p>\n\n<div class=\"example-block\">\n<p><span class=\"example-io\"><b>输入：</b>nums = [1,1,2,1]</span></p>\n\n<p><span class=\"example-io\"><b>输出：</b>2</span></p>\n\n<p><b>解释：</b></p>\n\n<p>美丽分割如下：</p>\n\n<ol>\n\t<li><code>nums1 = [1]</code>&nbsp;，<code>nums2 = [1,2]</code>&nbsp;，<code>nums3 = [1]</code>&nbsp;。</li>\n\t<li><code>nums1 = [1]</code>&nbsp;，<code>nums2 = [1]</code>&nbsp;，<code>nums3 = [2,1]</code>&nbsp;。</li>\n</ol>\n</div>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<div class=\"example-block\">\n<p><span class=\"example-io\"><b>输入：</b>nums = [1,2,3,4]</span></p>\n\n<p><span class=\"example-io\"><b>输出：</b>0</span></p>\n\n<p><strong>解释：</strong></p>\n\n<p>没有美丽分割。</p>\n</div>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= nums.length &lt;= 5000</code></li>\n\t<li><code><font face=\"monospace\">0 &lt;= nums[i] &lt;= 50</font></code></li>\n</ul>\n",
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