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4sum.json
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{
"data": {
"question": {
"questionId": "18",
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"categoryTitle": "Algorithms",
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"title": "4Sum",
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"content": "<p>Given an array <code>nums</code> of <code>n</code> integers, return <em>an array of all the <strong>unique</strong> quadruplets</em> <code>[nums[a], nums[b], nums[c], nums[d]]</code> such that:</p>\n\n<ul>\n\t<li><code>0 <= a, b, c, d < n</code></li>\n\t<li><code>a</code>, <code>b</code>, <code>c</code>, and <code>d</code> are <strong>distinct</strong>.</li>\n\t<li><code>nums[a] + nums[b] + nums[c] + nums[d] == target</code></li>\n</ul>\n\n<p>You may return the answer in <strong>any order</strong>.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,0,-1,0,-2,2], target = 0\n<strong>Output:</strong> [[-2,-1,1,2],[-2,0,0,2],[-1,0,0,1]]\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [2,2,2,2,2], target = 8\n<strong>Output:</strong> [[2,2,2,2]]\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= nums.length <= 200</code></li>\n\t<li><code>-10<sup>9</sup> <= nums[i] <= 10<sup>9</sup></code></li>\n\t<li><code>-10<sup>9</sup> <= target <= 10<sup>9</sup></code></li>\n</ul>\n",
"translatedTitle": "四数之和",
"translatedContent": "<p>给你一个由 <code>n</code> 个整数组成的数组 <code>nums</code> ，和一个目标值 <code>target</code> 。请你找出并返回满足下述全部条件且<strong>不重复</strong>的四元组 <code>[nums[a], nums[b], nums[c], nums[d]]</code> （若两个四元组元素一一对应，则认为两个四元组重复）：</p>\n\n<ul>\n\t<li><code>0 <= a, b, c, d < n</code></li>\n\t<li><code>a</code>、<code>b</code>、<code>c</code> 和 <code>d</code> <strong>互不相同</strong></li>\n\t<li><code>nums[a] + nums[b] + nums[c] + nums[d] == target</code></li>\n</ul>\n\n<p>你可以按 <strong>任意顺序</strong> 返回答案 。</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>nums = [1,0,-1,0,-2,2], target = 0\n<strong>输出：</strong>[[-2,-1,1,2],[-2,0,0,2],[-1,0,0,1]]\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>nums = [2,2,2,2,2], target = 8\n<strong>输出：</strong>[[2,2,2,2]]\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 <= nums.length <= 200</code></li>\n\t<li><code>-10<sup>9</sup> <= nums[i] <= 10<sup>9</sup></code></li>\n\t<li><code>-10<sup>9</sup> <= target <= 10<sup>9</sup></code></li>\n</ul>\n",
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"code": "class Solution {\npublic:\n vector<vector<int>> fourSum(vector<int>& nums, int target) {\n\n }\n};",
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