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47 lines
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47 lines
2.5 KiB
HTML
<p>You are given two strings <code>s</code> and <code>t</code> such that every character occurs at most once in <code>s</code> and <code>t</code> is a permutation of <code>s</code>.</p>
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<p>The <strong>permutation difference</strong> between <code>s</code> and <code>t</code> is defined as the <strong>sum</strong> of the absolute difference between the index of the occurrence of each character in <code>s</code> and the index of the occurrence of the same character in <code>t</code>.</p>
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<p>Return the <strong>permutation difference</strong> between <code>s</code> and <code>t</code>.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">s = "abc", t = "bac"</span></p>
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<p><strong>Output:</strong> <span class="example-io">2</span></p>
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<p><strong>Explanation:</strong></p>
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<p>For <code>s = "abc"</code> and <code>t = "bac"</code>, the permutation difference of <code>s</code> and <code>t</code> is equal to the sum of:</p>
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<ul>
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<li>The absolute difference between the index of the occurrence of <code>"a"</code> in <code>s</code> and the index of the occurrence of <code>"a"</code> in <code>t</code>.</li>
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<li>The absolute difference between the index of the occurrence of <code>"b"</code> in <code>s</code> and the index of the occurrence of <code>"b"</code> in <code>t</code>.</li>
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<li>The absolute difference between the index of the occurrence of <code>"c"</code> in <code>s</code> and the index of the occurrence of <code>"c"</code> in <code>t</code>.</li>
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</ul>
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<p>That is, the permutation difference between <code>s</code> and <code>t</code> is equal to <code>|0 - 1| + |2 - 2| + |1 - 0| = 2</code>.</p>
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</div>
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<p><strong class="example">Example 2:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">s = "abcde", t = "edbac"</span></p>
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<p><strong>Output:</strong> <span class="example-io">12</span></p>
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<p><strong>Explanation:</strong> The permutation difference between <code>s</code> and <code>t</code> is equal to <code>|0 - 3| + |1 - 2| + |2 - 4| + |3 - 1| + |4 - 0| = 12</code>.</p>
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</div>
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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 <= s.length <= 26</code></li>
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<li>Each character occurs at most once in <code>s</code>.</li>
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<li><code>t</code> is a permutation of <code>s</code>.</li>
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<li><code>s</code> consists only of lowercase English letters.</li>
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</ul>
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