#include <fstream>
using namespace std;
int main(){
    fstream in("loverfinding.in", ios::in), out("loverfinding.out", ios::out);
    long n, x, y, xt, yt, times = 0;
    in >> n >> x >> y >> xt >> yt;
    if(x == xt && y == yt) goto succret;
    for(long i = 0; i < n; ++i){
        long dx, dy;
        in >> dx >> dy;
        x += dx, y += dy;
        ++times;
        if(x == xt && y == yt) goto succret;
    }
    goto errorret;
errorret:
    out << "SingleDogMZX" << endl;
    return 0;
succret:
    out << times << endl;
    return 0;
}