Bear and AB

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Limak has a string S, that consists of N lowercase English letters. Limak then created a new string by repeating S exactly K times. For example, for S = "abcb" and K = 2, he would get "abcbabcb". Your task is to count the number of subsequences "ab" (not necessarily consecutive) in the new string. In other words, find the number pairs of indices i Input The first line of the input contains an i

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solution.cppC++17

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