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			30 lines
		
	
	
		
			793 B
		
	
	
	
		
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<p>给你一个整数数组 <code>nums</code> 和一个整数 <code>k</code> ,请你统计并返回 <em>该数组中和为 <code>k</code><strong> </strong>的子数组的个数 </em>。</p>
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<p>子数组是数组中元素的连续非空序列。</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>nums = [1,1,1], k = 2
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<strong>输出:</strong>2
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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>nums = [1,2,3], k = 3
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<strong>输出:</strong>2
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</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 <= nums.length <= 2 * 10<sup>4</sup></code></li>
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	<li><code>-1000 <= nums[i] <= 1000</code></li>
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	<li><code>-10<sup>7</sup> <= k <= 10<sup>7</sup></code></li>
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</ul>
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