String Duplication

Consider a string str of n lowercase letters and an empty string emp. You can perform the following operation on emp to make it as str. - Append a letter of str to emp at a cost of 1 rupee. - Append any substring of emp to string emp without any cost. Given m strings(str0, str1,........,strm-1), find and print the minimum cost of copying each stri to empi on a new line. Input The first line co