ll@n,r=0,z=0,x,y;
Point2d<int,ll,double>@a[n],b[n+1];
n=ConvexHull(n,a,b);
rep(i,n){
	x=CrossProd(b[i],b[r>?=i]);
	while(y=CrossProd(b[i],b[r+1]),x<y){
		x=y;
		if(++r==n)r=0;
	}
	z>?=x;
}
wt(z);