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| 1 | +<h2><a href="https://leetcode.com/problems/max-difference-you-can-get-from-changing-an-integer/?envType=daily-question&envId=2025年06月15日">1432. Max Difference You Can Get From Changing an Integer</a></h2><h3>Medium</h3><hr><p>You are given an integer <code>num</code>. You will apply the following steps to <code>num</code> <strong>two</strong> separate times:</p> |
| 2 | + |
| 3 | +<ul> |
| 4 | + <li>Pick a digit <code>x (0 <= x <= 9)</code>.</li> |
| 5 | + <li>Pick another digit <code>y (0 <= y <= 9)</code>. Note <code>y</code> can be equal to <code>x</code>.</li> |
| 6 | + <li>Replace all the occurrences of <code>x</code> in the decimal representation of <code>num</code> by <code>y</code>.</li> |
| 7 | +</ul> |
| 8 | + |
| 9 | +<p>Let <code>a</code> and <code>b</code> be the two results from applying the operation to <code>num</code> <em>independently</em>.</p> |
| 10 | + |
| 11 | +<p>Return <em>the max difference</em> between <code>a</code> and <code>b</code>.</p> |
| 12 | + |
| 13 | +<p>Note that neither <code>a</code> nor <code>b</code> may have any leading zeros, and <strong>must not</strong> be 0.</p> |
| 14 | + |
| 15 | +<p> </p> |
| 16 | +<p><strong class="example">Example 1:</strong></p> |
| 17 | + |
| 18 | +<pre> |
| 19 | +<strong>Input:</strong> num = 555 |
| 20 | +<strong>Output:</strong> 888 |
| 21 | +<strong>Explanation:</strong> The first time pick x = 5 and y = 9 and store the new integer in a. |
| 22 | +The second time pick x = 5 and y = 1 and store the new integer in b. |
| 23 | +We have now a = 999 and b = 111 and max difference = 888 |
| 24 | +</pre> |
| 25 | + |
| 26 | +<p><strong class="example">Example 2:</strong></p> |
| 27 | + |
| 28 | +<pre> |
| 29 | +<strong>Input:</strong> num = 9 |
| 30 | +<strong>Output:</strong> 8 |
| 31 | +<strong>Explanation:</strong> The first time pick x = 9 and y = 9 and store the new integer in a. |
| 32 | +The second time pick x = 9 and y = 1 and store the new integer in b. |
| 33 | +We have now a = 9 and b = 1 and max difference = 8 |
| 34 | +</pre> |
| 35 | + |
| 36 | +<p> </p> |
| 37 | +<p><strong>Constraints:</strong></p> |
| 38 | + |
| 39 | +<ul> |
| 40 | + <li><code>1 <= num <= 10<sup>8</sup></code></li> |
| 41 | +</ul> |
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