Leetcode Problem 2243. Calculate Digit Sum of a String

2243. Calculate Digit Sum of a String

Leetcode Solutions

Iterative Grouping and Summation

  1. Check if the length of s is less than or equal to k. If it is, return s as is.
  2. While the length of s is greater than k, perform the following steps: a. Initialize an empty string new_s to store the result of this round. b. Iterate over s in chunks of size k. c. For each chunk, calculate the sum of its digits. d. Convert the sum to a string and append it to new_s. e. After processing all chunks, assign new_s to s for the next iteration.
  3. Return s after the loop ends.
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Recursive Grouping and Summation

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