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			35 lines
		
	
	
		
			650 B
		
	
	
	
		
			HTML
		
	
	
	
	
	
			
		
		
	
	
			35 lines
		
	
	
		
			650 B
		
	
	
	
		
			HTML
		
	
	
	
	
	
<p>给定两个整数 <code>n</code> 和 <code>k</code>,返回范围 <code>[1, n]</code> 中所有可能的 <code>k</code> 个数的组合。</p>
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<p>你可以按 <strong>任何顺序</strong> 返回答案。</p>
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<p> </p>
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<p><strong>示例 1:</strong></p>
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<pre>
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<strong>输入:</strong>n = 4, k = 2
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<strong>输出:</strong>
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[
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  [2,4],
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  [3,4],
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  [2,3],
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  [1,2],
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  [1,3],
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  [1,4],
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]</pre>
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<p><strong>示例 2:</strong></p>
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<pre>
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<strong>输入:</strong>n = 1, k = 1
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<strong>输出:</strong>[[1]]</pre>
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<p> </p>
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<p><strong>提示:</strong></p>
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<ul>
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	<li><code>1 <= n <= 20</code></li>
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	<li><code>1 <= k <= n</code></li>
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</ul>
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