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49 lines
2.3 KiB
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49 lines
2.3 KiB
HTML
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<p>You are given a <strong>0-indexed</strong> integer array <code>mapping</code> which represents the mapping rule of a shuffled decimal system. <code>mapping[i] = j</code> means digit <code>i</code> should be mapped to digit <code>j</code> in this system.</p>
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<p>The <strong>mapped value</strong> of an integer is the new integer obtained by replacing each occurrence of digit <code>i</code> in the integer with <code>mapping[i]</code> for all <code>0 <= i <= 9</code>.</p>
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<p>You are also given another integer array <code>nums</code>. Return <em>the array </em><code>nums</code><em> sorted in <strong>non-decreasing</strong> order based on the <strong>mapped values</strong> of its elements.</em></p>
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<p><strong>Notes:</strong></p>
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<ul>
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<li>Elements with the same mapped values should appear in the <strong>same relative order</strong> as in the input.</li>
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<li>The elements of <code>nums</code> should only be sorted based on their mapped values and <strong>not be replaced</strong> by them.</li>
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</ul>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> mapping = [8,9,4,0,2,1,3,5,7,6], nums = [991,338,38]
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<strong>Output:</strong> [338,38,991]
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<strong>Explanation:</strong>
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Map the number 991 as follows:
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1. mapping[9] = 6, so all occurrences of the digit 9 will become 6.
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2. mapping[1] = 9, so all occurrences of the digit 1 will become 9.
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Therefore, the mapped value of 991 is 669.
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338 maps to 007, or 7 after removing the leading zeros.
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38 maps to 07, which is also 7 after removing leading zeros.
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Since 338 and 38 share the same mapped value, they should remain in the same relative order, so 338 comes before 38.
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Thus, the sorted array is [338,38,991].
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</pre>
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<p><strong>Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> mapping = [0,1,2,3,4,5,6,7,8,9], nums = [789,456,123]
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<strong>Output:</strong> [123,456,789]
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<strong>Explanation:</strong> 789 maps to 789, 456 maps to 456, and 123 maps to 123. Thus, the sorted array is [123,456,789].
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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>mapping.length == 10</code></li>
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<li><code>0 <= mapping[i] <= 9</code></li>
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<li>All the values of <code>mapping[i]</code> are <strong>unique</strong>.</li>
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<li><code>1 <= nums.length <= 3 * 10<sup>4</sup></code></li>
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<li><code>0 <= nums[i] < 10<sup>9</sup></code></li>
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</ul>
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