# will contain all the characters in T in complexity O(n). current_count = [0 for i in xrange(52)] expected_count = [0 for i in xrange(52)] for char in t: expected ...

# will contain all the characters in T in complexity O(n). while expected_count[ord(s[start]) - ord('a')] == 0 or \ current_count[ord(s[start]) - ord('a')] > expected ...