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3223. Minimum Length of String After Operations
- You are given a string s.
- You can perform the following process on s any number of times:
- Choose an index i in the string such that there is at least one character to the left of index i that is equal to s[i], and at least one character to the right that is also equal to s[i].
- Delete the closest character to the left of index i that is equal to s[i].
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