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算法题（国外版）/next-greater-numerically-balanced-number.html

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+<p>An integer <code>x</code> is <strong>numerically balanced</strong> if for every digit <code>d</code> in the number <code>x</code>, there are <strong>exactly</strong> <code>d</code> occurrences of that digit in <code>x</code>.</p>
+
+<p>Given an integer <code>n</code>, return <em>the <strong>smallest numerically balanced</strong> number <strong>strictly greater</strong> than </em><code>n</code><em>.</em></p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 1
+<strong>Output:</strong> 22
+<strong>Explanation:</strong> 
+22 is numerically balanced since:
+- The digit 2 occurs 2 times. 
+It is also the smallest numerically balanced number strictly greater than 1.
+</pre>
+
+<p><strong>Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 1000
+<strong>Output:</strong> 1333
+<strong>Explanation:</strong> 
+1333 is numerically balanced since:
+- The digit 1 occurs 1 time.
+- The digit 3 occurs 3 times. 
+It is also the smallest numerically balanced number strictly greater than 1000.
+Note that 1022 cannot be the answer because 0 appeared more than 0 times.
+</pre>
+
+<p><strong>Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> n = 3000
+<strong>Output:</strong> 3133
+<strong>Explanation:</strong> 
+3133 is numerically balanced since:
+- The digit 1 occurs 1 time.
+- The digit 3 occurs 3 times.
+It is also the smallest numerically balanced number strictly greater than 3000.
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>0 &lt;= n &lt;= 10<sup>6</sup></code></li>
+</ul>