ll@n,x[n],y[],z=0;
rd((x,y)(n));
rep(j,n){
	rep(i,j){
		ll nx=y[j]-y[i];
		ll ny=x[i]-x[j];
		ll d0=ll_inf;
		ll d1=-ll_inf;
		rep(k,j){
			if(k!=i){
				ll d=nx*x[k]+ny*y[k];
				d0<?=d;
				d1>?=d;
			}
		}
		z>?=d1-d0;
	}
}
wt(z);