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46 lines
1.7 KiB
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46 lines
1.7 KiB
HTML
<p>The <strong>score</strong> of an array is defined as the <strong>product</strong> of its sum and its length.</p>
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<ul>
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<li>For example, the score of <code>[1, 2, 3, 4, 5]</code> is <code>(1 + 2 + 3 + 4 + 5) * 5 = 75</code>.</li>
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</ul>
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<p>Given a positive integer array <code>nums</code> and an integer <code>k</code>, return <em>the <strong>number of non-empty subarrays</strong> of</em> <code>nums</code> <em>whose score is <strong>strictly less</strong> than</em> <code>k</code>.</p>
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<p>A <strong>subarray</strong> is a contiguous sequence of elements within an array.</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> nums = [2,1,4,3,5], k = 10
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<strong>Output:</strong> 6
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<strong>Explanation:</strong>
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The 6 subarrays having scores less than 10 are:
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- [2] with score 2 * 1 = 2.
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- [1] with score 1 * 1 = 1.
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- [4] with score 4 * 1 = 4.
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- [3] with score 3 * 1 = 3.
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- [5] with score 5 * 1 = 5.
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- [2,1] with score (2 + 1) * 2 = 6.
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Note that subarrays such as [1,4] and [4,3,5] are not considered because their scores are 10 and 36 respectively, while we need scores strictly less than 10.</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> nums = [1,1,1], k = 5
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<strong>Output:</strong> 5
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<strong>Explanation:</strong>
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Every subarray except [1,1,1] has a score less than 5.
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[1,1,1] has a score (1 + 1 + 1) * 3 = 9, which is greater than 5.
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Thus, there are 5 subarrays having scores less than 5.
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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 <= 10<sup>5</sup></code></li>
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<li><code>1 <= nums[i] <= 10<sup>5</sup></code></li>
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<li><code>1 <= k <= 10<sup>15</sup></code></li>
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</ul>
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