Leetcode Problem 443. String Compression

443. String Compression

Leetcode Solutions

Initialize two pointers i and res to 0.
While i is less than the length of chars: a. Set groupLength to 1. b. While the next character is the same as chars[i], increment groupLength and i. c. Write the character chars[i] to chars[res] and increment res. d. If groupLength is greater than 1, convert groupLength to a string and write each digit to chars[res] incrementing res for each digit written. e. Increment i to move to the next group of characters.
Return res as the new length of the array.

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