#include<bits/stdc++.h>
// #define int long long
#define reg register
inline int read(){
	int k=1,x=0;char ch=getchar();
	while (ch<'0'||ch>'9') {if (ch=='-') k=-1; ch=getchar();}
	while (ch>='0'&&ch<='9') x=(x<<3)+(x<<1)+ch-48,ch=getchar();
	return k*x;
}
const int N=810,V=400;
int n,fa[N*N],ID[N][N],idx;
struct Node{int x,y;}p[N];
inline int cabs(reg int x){return x<0?-x:x;}
signed main(){
	n=read();
	for (reg int i=1;i<=n;i++) p[i].x=read(),p[i].y=read();
	reg int gx=0,gy=0;
	for (reg int i=1;i<n;i++){
		reg int lx=cabs(p[i].x-p[i+1].x),ly=cabs(p[i].y-p[i+1].y);
		gx=std::__gcd(gx,lx),gy=std::__gcd(gy,ly);
	}
	printf("%lld\n",1ll*gx*gy);
	return 0;
}