Cod sursa(job #1774130)

Utilizator blackmanta45Andrei blackmanta45 Data 8 octombrie 2016 16:49:43
Problema Litere Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.31 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std;
ifstream fin ("litere.in");
ofstream fout ("litere.out");
int n,i,j,a,s,v[28];
char c;
int main () {
    fin>>n;
    for(i=1;i<=n;i++){
        fin>>c;
        a=c-'a';
        for(j=a+1;j<=27;j++)
            s+=v[j];
        v[a]++;
    }
    fout<<s;
}