솜씨좋은장씨

Given an array of characters, compress it in-place. The length after compression must always be smaller than or equal to the original array. Every element of the array should be a character (not int) of length 1. After you are done modifying the input array in-place, return the new length of the array. Follow up: Could you solve it using only O(1) extra space? Example 1: Input: ["a","a","b","b",..