Given a string,find the first un-repeated character in it?
Im getting O(n2) or O(mn)
Anyone with a solution of lower complexity..??
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take two integer arrays A and B of size 26 ,A is for storing count and
B is for index .Initialize both the array with 0's. Then iterate
through the string once and keep incrementing the respective character
count in A and store the character index in B. Now in array B find
the minimum index whose
