2 pointer Python C++解Leetcode 3163 String Compression III
[codes on Leetcode]https://leetcode.com/problems/string-compression-iii/solutions/6004059/string-with-2-pointers-3ms-beats-99-15/
[2-pointer/Sliding window play list]https://www.youtube.com/watch?v=--IlX3x54nk&list=PLYRlUBnWnd5KrCfs7qCFb-Bvn7dvnakFy
