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54 lines
2.3 KiB
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54 lines
2.3 KiB
HTML
<p>You are given a string <code>s</code> consisting of lowercase English letters, and an integer <code>k</code>.</p>
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<p>First, <strong>convert</strong> <code>s</code> into an integer by replacing each letter with its position in the alphabet (i.e., replace <code>'a'</code> with <code>1</code>, <code>'b'</code> with <code>2</code>, ..., <code>'z'</code> with <code>26</code>). Then, <strong>transform</strong> the integer by replacing it with the <strong>sum of its digits</strong>. Repeat the <strong>transform</strong> operation <code>k</code><strong> times</strong> in total.</p>
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<p>For example, if <code>s = "zbax"</code> and <code>k = 2</code>, then the resulting integer would be <code>8</code> by the following operations:</p>
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<ul>
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<li><strong>Convert</strong>: <code>"zbax" ➝ "(26)(2)(1)(24)" ➝ "262124" ➝ 262124</code></li>
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<li><strong>Transform #1</strong>: <code>262124 ➝ 2 + 6 + 2 + 1 + 2 + 4 ➝ 17</code></li>
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<li><strong>Transform #2</strong>: <code>17 ➝ 1 + 7 ➝ 8</code></li>
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</ul>
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<p>Return <em>the resulting integer after performing the operations described above</em>.</p>
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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> s = "iiii", k = 1
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<strong>Output:</strong> 36
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<strong>Explanation:</strong> The operations are as follows:
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- Convert: "iiii" ➝ "(9)(9)(9)(9)" ➝ "9999" ➝ 9999
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- Transform #1: 9999 ➝ 9 + 9 + 9 + 9 ➝ 36
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Thus the resulting integer is 36.
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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> s = "leetcode", k = 2
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<strong>Output:</strong> 6
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<strong>Explanation:</strong> The operations are as follows:
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- Convert: "leetcode" ➝ "(12)(5)(5)(20)(3)(15)(4)(5)" ➝ "12552031545" ➝ 12552031545
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- Transform #1: 12552031545 ➝ 1 + 2 + 5 + 5 + 2 + 0 + 3 + 1 + 5 + 4 + 5 ➝ 33
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- Transform #2: 33 ➝ 3 + 3 ➝ 6
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Thus the resulting integer is 6.
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</pre>
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<p><strong>Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> s = "zbax", k = 2
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<strong>Output:</strong> 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 <= s.length <= 100</code></li>
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<li><code>1 <= k <= 10</code></li>
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<li><code>s</code> consists of lowercase English letters.</li>
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</ul>
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