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

class IDX:
    def __init__(self,i):
        self.i=i
    def __lt__(self,other):
        i=self.i
        j=other.i
        return X[i]*Y[j]<X[j]*Y[i]

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)))
if N<=100:
    ans=max(abs(X[i]*Y[j]-X[j]*Y[i]) for i in range(N) for j in range(i+1,N))
else:
    arg+=[c+360 for c in arg]
    ans=0
    idx=[IDX(i) for i in range(N)]
    X*=2
    Y*=2
    idx.sort(reverse=True)
    idx=[ID.i for ID in idx]
    idx+=[i+N for i in idx]
    j=0
    for i in range(N):
        while arg[idx[j]]-arg[idx[i]]<90:
            j+=1
        for jj in range(j-100,j+101):
            ans=max(ans,abs(X[idx[i]]*Y[idx[jj]]-X[idx[jj]]*Y[idx[i]]))
    idx=[IDX(i) for i in range(N)]
    X*=2
    Y*=2
    idx.sort(reverse=False)
    idx=[ID.i for ID in idx]
    idx+=[i+N for i in idx]
    j=0
    for i in range(N):
        while arg[idx[j]]-arg[idx[i]]<90:
            j+=1
        for jj in range(j-100,j+101):
            ans=max(ans,abs(X[idx[i]]*Y[idx[jj]]-X[idx[jj]]*Y[idx[i]]))
print(ans)