#include<iostream>
#include<cstdio>
using namespace std;
int n,x0,cc,xt,yt;
int sum=1;
bool f[5010][5010]={0};

inline int read()
{
	int x=0,f=1;
	char c=getchar();
	while(c<'0'||c>'9')
	{
		if(c=='-')
			f=-1;
		c=getchar();
	}	
	while(c>='0'&&c<='9')
	{
		x=x*10+c-'0';
		c=getchar();
	}
	return x*f;
}

int main()
{
	freopen("loverfinding.in","r",stdin);
	freopen("loverfinding.out","w",stdout);
	n=read(),x0=read(),cc=read(),xt=read(),yt=read();
	int nowx=x0,nowy=cc,dx,dy;
	f[nowx+2500][nowy+2500]=1;
	if(x0==xt&&cc==yt)
	{
		cout<<sum<<endl;
		return 0;
	}
	for(int i=1;i<=n;i++)
	{
		dx=read(),dy=read();
		nowx+=dx,nowy+=dy;
		if(nowx==xt&&nowy==yt)
		{
			sum++;
			cout<<sum<<endl;
			return 0;
		}
		else
		{
			if(f[nowx+2500][nowy+2500])
				continue;
			else
			{
				sum++;
				f[nowx+2500][nowy+2500]=1;
			}
		}
	}
	cout<<"SingleDogMZX"<<endl;
	return 0;
}