Codeforces Educational Round 87 B video editorial

Link to the video : Ternary String

I have added this as a practice problem to my binary search course , so if you want to learn binary search and want to know how binary search can be used to solve beautiful problems like these do checkout my course on that , link is given below

Course Link : https://www.youtube.com/playlist?list=PL2q4fbVm1Ik5HC7D3gUwc8cqwDtvOaqke

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