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41 lines
1.6 KiB
HTML
41 lines
1.6 KiB
HTML
<p>You are given an integer <code>num</code>. You will apply the following steps exactly <strong>two</strong> times:</p>
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<ul>
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<li>Pick a digit <code>x (0 <= x <= 9)</code>.</li>
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<li>Pick another digit <code>y (0 <= y <= 9)</code>. The digit <code>y</code> can be equal to <code>x</code>.</li>
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<li>Replace all the occurrences of <code>x</code> in the decimal representation of <code>num</code> by <code>y</code>.</li>
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<li>The new integer <strong>cannot</strong> have any leading zeros, also the new integer <strong>cannot</strong> be 0.</li>
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</ul>
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<p>Let <code>a</code> and <code>b</code> be the results of applying the operations to <code>num</code> the first and second times, respectively.</p>
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<p>Return <em>the max difference</em> between <code>a</code> and <code>b</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> num = 555
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<strong>Output:</strong> 888
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<strong>Explanation:</strong> The first time pick x = 5 and y = 9 and store the new integer in a.
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The second time pick x = 5 and y = 1 and store the new integer in b.
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We have now a = 999 and b = 111 and max difference = 888
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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> num = 9
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<strong>Output:</strong> 8
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<strong>Explanation:</strong> The first time pick x = 9 and y = 9 and store the new integer in a.
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The second time pick x = 9 and y = 1 and store the new integer in b.
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We have now a = 9 and b = 1 and max difference = 8
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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 <= num <= 10</code><sup>8</sup></li>
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</ul>
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