import bisect
import copy
import decimal
import fractions
import heapq
import itertools
import math
import random
import sys
import time
from collections import Counter,deque,defaultdict
from functools import lru_cache,reduce
from heapq import heappush,heappop,heapify,heappushpop,_heappop_max,_heapify_max
def _heappush_max(heap,item):
    heap.append(item)
    heapq._siftdown_max(heap, 0, len(heap)-1)
def _heappushpop_max(heap, item):
    if heap and item < heap[0]:
        item, heap[0] = heap[0], item
        heapq._siftup_max(heap, 0)
    return item
from math import gcd as GCD
read=sys.stdin.read
readline=sys.stdin.readline
readlines=sys.stdin.readlines

N=int(readline())
X,Y=[],[]
arg=[]
for _ in range(N):
    x,y=map(int,readline().split())
    X.append(x)
    Y.append(y)
    arg.append(math.degrees(math.atan2(y,x)))
arg+=[c+360 for c in arg]
idx=[i for i in range(N)]
X*=2
Y*=2
idx.sort(key=lambda i:arg[i])
idx+=[i+N for i in idx]
j=0
ans=0
for i in range(N):
    while arg[idx[j]]-arg[idx[i]]<90:
        j+=1
    ans=max(ans,abs(X[idx[i]]*Y[idx[j]]-X[idx[j]]*Y[idx[i]]))
    ans=max(ans,abs(X[idx[i]]*Y[idx[j-1]]-X[idx[j-1]]*Y[idx[i]]))
print(ans)