def cross3(a, b, c):
    return (b[0]-a[0])*(c[1]-a[1]) - (b[1]-a[1])*(c[0]-a[0])

# ps = [(x, y), ...]: ソートされた座標list
def convex_hull(ps):
    qs = []
    N = len(ps)
    for p in ps:
        # 一直線上で高々2点にする場合は ">=" にする
        while len(qs) > 1 and cross3(qs[-1], qs[-2], p) > 0:
            qs.pop()
        qs.append(p)
    t = len(qs)
    for i in range(N-2, -1, -1):
        p = ps[i]
        while len(qs) > t and cross3(qs[-1], qs[-2], p) > 0:
            qs.pop()
        qs.append(p)
    return qs

n=int(input())
xy=[]
for i in range(n):
  x,y=map(int,input().split())
  xy.append((x,y))

xy.sort()
xy=convex_hull(xy)
m=len(xy)

ans=0
for i in range(m):
  for j in range(i+1,m):
    xi,yi=xy[i]
    xj,yj=xy[j]
    s=abs(xi*yj-xj*yi)
    ans=max(ans,s)

print(ans)