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40 lines
1.4 KiB
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40 lines
1.4 KiB
HTML
<p>Given an integer array <code>arr</code>, remove a subarray (can be empty) from <code>arr</code> such that the remaining elements in <code>arr</code> are <strong>non-decreasing</strong>.</p>
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<p>Return <em>the length of the shortest subarray to remove</em>.</p>
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<p>A <strong>subarray</strong> is a contiguous subsequence of the 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> arr = [1,2,3,10,4,2,3,5]
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<strong>Output:</strong> 3
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<strong>Explanation:</strong> The shortest subarray we can remove is [10,4,2] of length 3. The remaining elements after that will be [1,2,3,3,5] which are sorted.
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Another correct solution is to remove the subarray [3,10,4].
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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 = [5,4,3,2,1]
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<strong>Output:</strong> 4
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<strong>Explanation:</strong> Since the array is strictly decreasing, we can only keep a single element. Therefore we need to remove a subarray of length 4, either [5,4,3,2] or [4,3,2,1].
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</pre>
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<p><strong class="example">Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> arr = [1,2,3]
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<strong>Output:</strong> 0
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<strong>Explanation:</strong> The array is already non-decreasing. We do not need to remove any elements.
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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>0 <= arr[i] <= 10<sup>9</sup></code></li>
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</ul>
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