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36 lines
1.1 KiB
HTML
36 lines
1.1 KiB
HTML
<p>Given an array of integers <code>nums</code> and an integer <code>k</code>. A continuous subarray is called <strong>nice</strong> if there are <code>k</code> odd numbers on it.</p>
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<p>Return <em>the number of <strong>nice</strong> sub-arrays</em>.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> nums = [1,1,2,1,1], k = 3
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<strong>Output:</strong> 2
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<strong>Explanation:</strong> The only sub-arrays with 3 odd numbers are [1,1,2,1] and [1,2,1,1].
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</pre>
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<p><strong>Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> nums = [2,4,6], k = 1
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<strong>Output:</strong> 0
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<strong>Explanation:</strong> There is no odd numbers in the array.
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</pre>
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<p><strong>Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> nums = [2,2,2,1,2,2,1,2,2,2], k = 2
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<strong>Output:</strong> 16
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>1 <= nums.length <= 50000</code></li>
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<li><code>1 <= nums[i] <= 10^5</code></li>
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<li><code>1 <= k <= nums.length</code></li>
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</ul> |