Submission #2371345

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Source Code Expand

#include <iostream>
#include <string>

using namespace std;

int main(int argc, char **argv) {
  string s;
  cin >> s;

  int c[100] = {0};
  for (int i = 0; i < s.length(); i++)
    c[s[i] - 'a']++;

  int r = 1;
  for (int i = 0; i < 26; i++)
    for (int j = i+1; j < 26; j++) 
      r += c[i] * c[j];
    

  cout << r;
}

Submission Info

Judge Result