Please solve using C You are given a string S of small letters. Count the total unique characters from the string and print them. Note: Here unique means that occured exactly once. Input Format The first line of the input will contain a positive integer N. (Length of the string) The second line will contain a string S, consisting of small letters(a-z) Constraints 0 < N <= 100 a <= S[i] <=z Output Format Print the total number of unique characters. Sample Input 0 12 iuuasdbddqzu Sample Output 0 6 Sample Input 1 10 acckyppomp Sample Output 1 5