leetcode-problemset/leetcode-cn/originData/combination-sum.json

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            "categoryTitle": "Algorithms",
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            "title": "Combination Sum",
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            "content": "<p>Given an array of <strong>distinct</strong> integers <code>candidates</code> and a target integer <code>target</code>, return <em>a list of all <strong>unique combinations</strong> of </em><code>candidates</code><em> where the chosen numbers sum to </em><code>target</code><em>.</em> You may return the combinations in <strong>any order</strong>.</p>\n\n<p>The <strong>same</strong> number may be chosen from <code>candidates</code> an <strong>unlimited number of times</strong>. Two combinations are unique if the <span data-keyword=\"frequency-array\">frequency</span> of at least one of the chosen numbers is different.</p>\n\n<p>The test cases are generated such that the number of unique combinations that sum up to <code>target</code> is less than <code>150</code> combinations for the given input.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> candidates = [2,3,6,7], target = 7\n<strong>Output:</strong> [[2,2,3],[7]]\n<strong>Explanation:</strong>\n2 and 3 are candidates, and 2 + 2 + 3 = 7. Note that 2 can be used multiple times.\n7 is a candidate, and 7 = 7.\nThese are the only two combinations.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> candidates = [2,3,5], target = 8\n<strong>Output:</strong> [[2,2,2,2],[2,3,3],[3,5]]\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> candidates = [2], target = 1\n<strong>Output:</strong> []\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= candidates.length &lt;= 30</code></li>\n\t<li><code>2 &lt;= candidates[i] &lt;= 40</code></li>\n\t<li>All elements of <code>candidates</code> are <strong>distinct</strong>.</li>\n\t<li><code>1 &lt;= target &lt;= 40</code></li>\n</ul>\n",
            "translatedTitle": "组合总和",
            "translatedContent": "<p>给你一个 <strong>无重复元素</strong> 的整数数组&nbsp;<code>candidates</code> 和一个目标整数&nbsp;<code>target</code>&nbsp;，找出&nbsp;<code>candidates</code>&nbsp;中可以使数字和为目标数&nbsp;<code>target</code> 的 所有<em>&nbsp;</em><strong>不同组合</strong> ，并以列表形式返回。你可以按 <strong>任意顺序</strong> 返回这些组合。</p>\n\n<p><code>candidates</code> 中的 <strong>同一个</strong> 数字可以 <strong>无限制重复被选取</strong> 。如果至少一个数字的被选数量不同，则两种组合是不同的。&nbsp;</p>\n\n<p>对于给定的输入，保证和为&nbsp;<code>target</code> 的不同组合数少于 <code>150</code> 个。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例&nbsp;1：</strong></p>\n\n<pre>\n<strong>输入：</strong>candidates = <code>[2,3,6,7], </code>target = <code>7</code>\n<strong>输出：</strong>[[2,2,3],[7]]\n<strong>解释：</strong>\n2 和 3 可以形成一组候选，2 + 2 + 3 = 7 。注意 2 可以使用多次。\n7 也是一个候选， 7 = 7 。\n仅有这两种组合。</pre>\n\n<p><strong>示例&nbsp;2：</strong></p>\n\n<pre>\n<strong>输入: </strong>candidates = [2,3,5]<code>, </code>target = 8\n<strong>输出: </strong>[[2,2,2,2],[2,3,3],[3,5]]</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入: </strong>candidates = <code>[2], </code>target = 1\n<strong>输出: </strong>[]\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= candidates.length &lt;= 30</code></li>\n\t<li><code>2 &lt;= candidates[i] &lt;= 40</code></li>\n\t<li><code>candidates</code> 的所有元素 <strong>互不相同</strong></li>\n\t<li><code>1 &lt;= target &lt;= 40</code></li>\n</ul>\n",
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                    "code": "class Solution(object):\n    def combinationSum(self, candidates, target):\n        \"\"\"\n        :type candidates: List[int]\n        :type target: int\n        :rtype: List[List[int]]\n        \"\"\"",
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