How to Solve Sum of Digits of String After Convert Problem
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Sum of Digits of String After Convert
You are given a string s consisting of lowercase English letters, and an integer k. Your task is to convert the string into an integer by a special process, and then transform it by summing its digits...
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Understanding the Sum of Digits of String After Convert Problem
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Problem Statement
You are given a string s consisting of lowercase English letters, and an integer k. Your task is to convert the string into an integer by a special process, and then transform it by summing its digits repeatedly k times. More specifically, perform the following steps: Convert s into an integer by replacing each letter with its position in the alphabet (i.e. replace 'a' with 1, 'b' with 2, ..., 'z' with 26). Transform the integer by replacing it with the sum of its digits. Repeat the transform operation (step 2) k times in total. For example, if s = "zbax" and k = 2, then the resulting integer would be 8 by the following operations: Convert: "zbax" ➝ "(26)(2)(1)(24)" ➝ "262124" ➝ 262124 Transform #1: 262124 ➝ 2 + 6 + 2 + 1 + 2 + 4 ➝ 17 Transform #2: 17 ➝ 1 + 7 ➝ 8 Return the resulting integer after performing the operations described above.
Sum of Digits of String After Convert
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Examples
s = "iiii", k = 136The operations are as follows: - Convert: "iiii" ➝ "(9)(9)(9)(9)" ➝ "9999" ➝ 9999 - Transform #1: 9999 ➝ 9 + 9 + 9 + 9 ➝ 36 Thus the resulting integer is 36.
s = "leetcode", k = 26The operations are as follows: - Convert: "leetcode" ➝ "(12)(5)(5)(20)(3)(15)(4)(5)" ➝ "12552031545" ➝ 12552031545 - Transform #1: 12552031545 ➝ 1 + 2 + 5 + 5 + 2 + 0 + 3 + 1 + 5 + 4 + 5 ➝ 33 - Transform #2: 33 ➝ 3 + 3 ➝ 6 Thus the resulting integer is 6.
s = "zbax", k = 28Constraints
1 <= s.length <= 1001 <= k <= 10s consists of lowercase English letters.How Interview Coder Helps with Leetcode Problems
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