Cod sursa(job #1964147)

Utilizator 3DwArDPauliuc Edward 3DwArD Data 13 aprilie 2017 10:25:57
Problema Litere Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.31 kb
Raporteaza aceasta sursa 
#include <bits/stdc++.h>

using namespace std;
ifstream f("litere.in");
ofstream g("litere.out");
int n,ans;
int v[124];
int main()
{
    f>>n;
    string s;
    f>>s;
    for(int i=0;i<s.size();i++){
        v[s[i]]++;
        for(int j=122;j>s[i];j--)ans+=v[j];
    }
    g<<ans;
    return 0;
}