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

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            "title": "Combination Sum III",
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            "content": "<p>Find all valid combinations of <code>k</code> numbers that sum up to <code>n</code> such that the following conditions are true:</p>\n\n<ul>\n\t<li>Only numbers <code>1</code> through <code>9</code> are used.</li>\n\t<li>Each number is used <strong>at most once</strong>.</li>\n</ul>\n\n<p>Return <em>a list of all possible valid combinations</em>. The list must not contain the same combination twice, and the combinations may be returned in any order.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> k = 3, n = 7\n<strong>Output:</strong> [[1,2,4]]\n<strong>Explanation:</strong>\n1 + 2 + 4 = 7\nThere are no other valid combinations.</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> k = 3, n = 9\n<strong>Output:</strong> [[1,2,6],[1,3,5],[2,3,4]]\n<strong>Explanation:</strong>\n1 + 2 + 6 = 9\n1 + 3 + 5 = 9\n2 + 3 + 4 = 9\nThere are no other valid combinations.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> k = 4, n = 1\n<strong>Output:</strong> []\n<strong>Explanation:</strong> There are no valid combinations.\nUsing 4 different numbers in the range [1,9], the smallest sum we can get is 1+2+3+4 = 10 and since 10 &gt; 1, there are no valid combination.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2 &lt;= k &lt;= 9</code></li>\n\t<li><code>1 &lt;= n &lt;= 60</code></li>\n</ul>\n",
            "translatedTitle": "组合总和 III",
            "translatedContent": "<p>找出所有相加之和为&nbsp;<code>n</code><em> </em>的&nbsp;<code>k</code><strong>&nbsp;</strong>个数的组合，且满足下列条件：</p>\n\n<ul>\n\t<li>只使用数字1到9</li>\n\t<li>每个数字&nbsp;<strong>最多使用一次</strong>&nbsp;</li>\n</ul>\n\n<p>返回 <em>所有可能的有效组合的列表</em> 。该列表不能包含相同的组合两次，组合可以以任何顺序返回。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1:</strong></p>\n\n<pre>\n<strong>输入:</strong> <em><strong>k</strong></em> = 3, <em><strong>n</strong></em> = 7\n<strong>输出:</strong> [[1,2,4]]\n<strong>解释:</strong>\n1 + 2 + 4 = 7\n没有其他符合的组合了。</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<strong>输入:</strong> <em><strong>k</strong></em> = 3, <em><strong>n</strong></em> = 9\n<strong>输出:</strong> [[1,2,6], [1,3,5], [2,3,4]]\n<strong>解释:\n</strong>1 + 2 + 6 = 9\n1 + 3 + 5 = 9\n2 + 3 + 4 = 9\n没有其他符合的组合了。</pre>\n\n<p><strong>示例 3:</strong></p>\n\n<pre>\n<strong>输入:</strong> k = 4, n = 1\n<strong>输出:</strong> []\n<strong>解释:</strong> 不存在有效的组合。\n在[1,9]范围内使用4个不同的数字，我们可以得到的最小和是1+2+3+4 = 10，因为10 &gt; 1，没有有效的组合。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>2 &lt;= k &lt;= 9</code></li>\n\t<li><code>1 &lt;= n &lt;= 60</code></li>\n</ul>\n",
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