Cod sursa(job #1782012)

Utilizator AndreidgDragomir Andrei Valentin Andreidg Data 17 octombrie 2016 18:36:23
Problema Litere Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.27 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std;
ifstream f("litere.in");
ofstream g("litere.out");
int n,i,j,a,s,v[28];
char c;
int main()
{
f>>n;
for(i=1;i<=n;i++)
{
    f>>c;
    a=c-'a';
    for(j=a+1;j<=27;j++)
    {
        s+=v[j];
    }
    v[a]++;
}
g<<s;
}