import sys
#import numpy as np
#import math
from fractions import Fraction
import itertools

input=sys.stdin.readline
def main():
  ans=1
  mod=1000000007
  n0=0
  na=nb=0
  n=int(input())
  d={}

  for i in range(n):
      a,b=map(int,input().split())
      if b==0 and a==0:
          n0+=1
      elif b==0:
          nb+=1
      elif a==0:
          na+=1
      else:
          if Fraction(a, b) not in d:
              d[Fraction(a, b)]=1
          else:
              d[Fraction(a, b)]+=1

  for i in d.keys():
      if Fraction(-1,i) in d:
          if i>0:
              ans*=pow(2,d[Fraction(-1, i)])-1+pow(2,d[i])-1+1
              ans=ans%mod
      else:
          ans*=pow(2,d[i])
          ans=ans%mod
  ans*=pow(2,na)-1+pow(2,nb)-1+1
  print((ans-1+n0)%mod)

if __name__ == '__main__':
    main()