https://leetcode.com/problems/minimum-length-of-string-after-operations
Type: Classic
"abaacbcbb"
charIndexes={a=[0, 2, 3], b=[1, 5, 7, 8], c=[4, 6]}
charIndexes={a=[2], b=[1, 5, 7, 8], c=[4, 6]}
charIndexes={a=[2], b=[5, 7], c=[4, 6]}
charIndexes={a=[0, 1]}
5
2