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29 lines
1.2 KiB
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29 lines
1.2 KiB
HTML
<p>Given an array of integers <code>arr</code> and two integers <code>k</code> and <code>threshold</code>, return <em>the number of sub-arrays of size </em><code>k</code><em> and average greater than or equal to </em><code>threshold</code>.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> arr = [2,2,2,2,5,5,5,8], k = 3, threshold = 4
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<strong>Output:</strong> 3
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<strong>Explanation:</strong> Sub-arrays [2,5,5],[5,5,5] and [5,5,8] have averages 4, 5 and 6 respectively. All other sub-arrays of size 3 have averages less than 4 (the threshold).
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> arr = [11,13,17,23,29,31,7,5,2,3], k = 3, threshold = 5
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<strong>Output:</strong> 6
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<strong>Explanation:</strong> The first 6 sub-arrays of size 3 have averages greater than 5. Note that averages are not integers.
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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 <= arr.length <= 10<sup>5</sup></code></li>
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<li><code>1 <= arr[i] <= 10<sup>4</sup></code></li>
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<li><code>1 <= k <= arr.length</code></li>
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<li><code>0 <= threshold <= 10<sup>4</sup></code></li>
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</ul>
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