Cod sursa(job #2021575)

Utilizator VarticeanNicolae Varticean Varticean Data 13 septembrie 2017 22:43:10
Problema Litere Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.32 kb
Raporteaza aceasta sursa 
#include <bits/stdc++.h>

using namespace std;
ifstream in("litere.in");
ofstream out("litere.out");
int n, ans, v[26];
int main()
{
 in >> n;
  char c;
  for(int i=1; i<=n; i++)
  {
      in >> c;
      v[c-'a']++;
      for( int j=25; j>=c-'a'+1; j-- )
      ans += v[j];
  }
  out << ans ;
    return 0;
}