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算法题（国外版）/minimum-number-of-steps-to-make-two-strings-anagram.html

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+<p>You are given two strings of the same length <code>s</code> and <code>t</code>. In one step you can choose <strong>any character</strong> of <code>t</code> and replace it with <strong>another character</strong>.</p>
+
+<p>Return <em>the minimum number of steps</em> to make <code>t</code> an anagram of <code>s</code>.</p>
+
+<p>An <strong>Anagram</strong> of a string is a string that contains the same characters with a different (or the same) ordering.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> s = &quot;bab&quot;, t = &quot;aba&quot;
+<strong>Output:</strong> 1
+<strong>Explanation:</strong> Replace the first &#39;a&#39; in t with b, t = &quot;bba&quot; which is anagram of s.
+</pre>
+
+<p><strong>Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> s = &quot;leetcode&quot;, t = &quot;practice&quot;
+<strong>Output:</strong> 5
+<strong>Explanation:</strong> Replace &#39;p&#39;, &#39;r&#39;, &#39;a&#39;, &#39;i&#39; and &#39;c&#39; from t with proper characters to make t anagram of s.
+</pre>
+
+<p><strong>Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> s = &quot;anagram&quot;, t = &quot;mangaar&quot;
+<strong>Output:</strong> 0
+<strong>Explanation:</strong> &quot;anagram&quot; and &quot;mangaar&quot; are anagrams. 
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= s.length &lt;= 5 * 10<sup>4</sup></code></li>
+	<li><code>s.length == t.length</code></li>
+	<li><code>s</code> and <code>t</code> consist of lowercase English letters only.</li>
+</ul>