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"title": "Longest Well-Performing Interval",
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"content": "<p>We are given <code>hours</code>, a list of the number of hours worked per day for a given employee.</p>\n\n<p>A day is considered to be a <em>tiring day</em> if and only if the number of hours worked is (strictly) greater than <code>8</code>.</p>\n\n<p>A <em>well-performing interval</em> is an interval of days for which the number of tiring days is strictly larger than the number of non-tiring days.</p>\n\n<p>Return the length of the longest well-performing interval.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> hours = [9,9,6,0,6,6,9]\n<strong>Output:</strong> 3\n<strong>Explanation: </strong>The longest well-performing interval is [9,9,6].\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> hours = [6,6,6]\n<strong>Output:</strong> 0\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= hours.length <= 10<sup>4</sup></code></li>\n\t<li><code>0 <= hours[i] <= 16</code></li>\n</ul>\n",
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"Make a new array A of +1/-1s corresponding to if hours[i] is > 8 or not. The goal is to find the longest subarray with positive sum.",
"Using prefix sums (PrefixSum[i+1] = A[0] + A[1] + ... + A[i]), you need to find for each j, the smallest i < j with PrefixSum[i] + 1 == PrefixSum[j]."
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