#include<bits/stdc++.h>
using namespace std;
long long ans,xxx,yyy,xt,yt,n,x,y,xx,yy;
bool v[6000][6000];
int main()
{
	freopen("loverfinding.in","r",stdin);
	freopen("loverfinding.out","w",stdout);
	cin>>n>>xxx>>yyy>>xt>>yt;
	if(xxx==xt&&yyy==yt)
	{
		cout<<1<<endl;
		return 0;
	}
	xxx+=2500;yyy+=2500;xt+=2500;yt+=2500;
	for(int i=1;i<=n;i++)
	{
		cin>>x>>y;
		xx=xxx+x;
		yy=yyy+y;
		if(v[xx][yy]==0)
		{
			v[xx][yy]=1;ans++;
		}
		if(xx==xt&&yy==yt)
		{
			ans++;
			printf("%lld\n",ans);
			//cout<<clock() * 1.0/CLOCKS_PER_SEC;
			return 0;
		}
		if(i==n) {
			cout<<"SingleDogMZX"<<endl;
			return 0;
		}
		xxx=xx;yyy=yy;
	}
	
	return 0;
}