Problema gebaila 2

#include<fstream>
#include<algorithm>

using namespace std;

int n, k, i, aux, nr, S;
int main()
{
    ifstream f("plopi2.in");
    ofstream g("plopi2.out");
    f >> n;
    f >> aux;
    for(i = 2; i <= n; i ++)
    {
        f >> nr;
        if(nr > aux)
        {
            S = S + nr - aux;
            ++ k;
        } else
        aux = nr;
    }
    g << k << " " << S;

    return 0;
}