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Starters 66-Good Binary Strings
source link: https://codeforces.com/blog/entry/109419?f0a28=1
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Why can't I flip all the 1's in the string, that way number of '01' substrings == number of '10' substrings == 0 ?
4 hours ago, # |
Each index is considered independently, i.e., you can flip only one index and then you have to tell the count of such indices which after flipping will make a good string.
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