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50 lines
2.3 KiB
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50 lines
2.3 KiB
HTML
<p>You are given a <strong>0-indexed</strong> integer array <code>nums</code>. Rearrange the values of <code>nums</code> according to the following rules:</p>
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<ol>
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<li>Sort the values at <strong>odd indices</strong> of <code>nums</code> in <strong>non-increasing</strong> order.
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<ul>
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<li>For example, if <code>nums = [4,<strong><u>1</u></strong>,2,<u><strong>3</strong></u>]</code> before this step, it becomes <code>[4,<u><strong>3</strong></u>,2,<strong><u>1</u></strong>]</code> after. The values at odd indices <code>1</code> and <code>3</code> are sorted in non-increasing order.</li>
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</ul>
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</li>
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<li>Sort the values at <strong>even indices</strong> of <code>nums</code> in <strong>non-decreasing</strong> order.
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<ul>
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<li>For example, if <code>nums = [<u><strong>4</strong></u>,1,<u><strong>2</strong></u>,3]</code> before this step, it becomes <code>[<u><strong>2</strong></u>,1,<u><strong>4</strong></u>,3]</code> after. The values at even indices <code>0</code> and <code>2</code> are sorted in non-decreasing order.</li>
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</ul>
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</li>
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</ol>
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<p>Return <em>the array formed after rearranging the values of</em> <code>nums</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> nums = [4,1,2,3]
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<strong>Output:</strong> [2,3,4,1]
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<strong>Explanation:</strong>
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First, we sort the values present at odd indices (1 and 3) in non-increasing order.
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So, nums changes from [4,<strong><u>1</u></strong>,2,<strong><u>3</u></strong>] to [4,<u><strong>3</strong></u>,2,<strong><u>1</u></strong>].
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Next, we sort the values present at even indices (0 and 2) in non-decreasing order.
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So, nums changes from [<u><strong>4</strong></u>,1,<strong><u>2</u></strong>,3] to [<u><strong>2</strong></u>,3,<u><strong>4</strong></u>,1].
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Thus, the array formed after rearranging the values is [2,3,4,1].
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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> nums = [2,1]
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<strong>Output:</strong> [2,1]
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<strong>Explanation:</strong>
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Since there is exactly one odd index and one even index, no rearrangement of values takes place.
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The resultant array formed is [2,1], which is the same as the initial array.
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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 <= 100</code></li>
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<li><code>1 <= nums[i] <= 100</code></li>
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</ul>
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