#define MD 998244353
ll@n,x[n],y[];
rd((x,y)(n));
rrep(i,n)x[i]-=x[0],y[i]-=y[0];
if(abs(x[n-1])<abs(y[n-1])){
	rep(i,n)swap(x[i],y[i]);
}
if(x[n-1]<0){
	rep(i,n)x[i]=-x[i];
}
rep(i,n)(x[i],y[i])=(x[i]+y[i],x[i]-y[i]);
ll x9=x[n-1],y9=y[n-1];
sortA(n,x,y);
ll s=0;
while(x[s]|y[s])++s;
ll t=s+1;
while(x[t]-x9|y[t]-y9)++t;
++t;
coordcomp(t-s,y+s);
fenwick<Mint>f;
f.malloc(n,1);
f.add(y[s],1);
rep(i,s+1,t-1){
	f.add(y[i],f.get(y[i]));
}
wt(f.get(y[t-1]));