from decimal import *
def sgn(x):
  if x==0:
    return 0
  if x>0:
    return 1
  return -1

def check(a,b,c):
  #if a==b or b==c:
  #  return sgn(b[0]-a[0])*sgn(c[1]-b[1])>=sgn(c[0]-b[0])*sgn(b[1]-a[1])
  return (b[0]-a[0])*(c[1]-b[1])>=(c[0]-b[0])*(b[1]-a[1])

def get_y(a,x):
  return a[0]*x+a[1]

from collections import deque
class CHT:
  __slots__=['H','F']
  def __init__(self,f):
    self.H=deque()
    self.F=f
  
  def add(self,x):
    h=self.H
    if self.F:
      x=(-x[0],-x[1])
    if len(h)==0:
      h.append(x)
      return 0
    if h[0][0]<=x[0]:
      if h[0][0]==x[0]:
        if h[0][1]<=x[1]:
          return 0
        h.popleft()
      while(len(h)>=2 and check(x,h[0],h[1])):
        h.popleft()
      h.appendleft(x)
    else:
      if(h[-1][0]==x[0]):
        if(h[-1][1]<=x[1]):
          return 0
        h.pop()
      while(len(h)>=2 and check(h[-2],h[-1],x)):
        h.pop()
      h.append(x)
  
  def query_i(self,x):
    h=self.H
    a=h[0]
    if len(h)>=2:
      b=h[1]
      while(len(h)>=2 and a[0]*x+a[1]>=b[0]*x+b[1]):
        h.popleft()
        a=b
        if len(h)<2:
          break
        b=h[1]
    if self.F:
      return -a[0]*x-a[1]
    else:
      return a[0]*x+a[1]

getcontext().prec=30
N=int(input())
eps=Decimal('1e-18')
X=[tuple(map(lambda x:Decimal(int(x)+eps),input().split())) for i in range(N)]
X.sort(key=lambda x:x[0]/x[1])
A=CHT(True)
B=CHT(False)
ANS=0
for i in range(N):
  a,b=X[i][0],X[i][1]
  if i:
    ANS=max(ANS,B.query_i(a/b)*b)
  B.add((-a,b))
for i in range(N):
  a,b=X[i][0],X[i][1]
  if i:
    ANS=max(ANS,-A.query_i(a/b)*b)
  A.add((a,-b))
print(round(ANS))