PRIME = 1000000007
n = int(input())

fish = {}
taste_0 = 0
flavor_0 = 0

for i in range(n):
  a, b = map(int, input().split())
  if a != 0 and b != 0:
    if a / b in fish:
      fish[a / b] = fish[a / b] + 1
    else:
      fish[a / b] = 1
  elif a == 0:
    taste_0 += 1
  else:
    flavor_0 += 1

cnt = 0
if taste_0 != 0 and flavor_0 != 0:
  ans = pow(2, taste_0, PRIME)
  ans += pow(2, flavor_0, PRIME) - 1
  ans %= PRIME
else:
  cnt += taste_0
  cnt += flavor_0
  ans = 1

for f in fish:
  if - 1 / f in fish and fish[f] > 0:
    ans1 = pow(2, fish[f], PRIME)
    ans1 += pow(2, fish[-1 / f], PRIME) - 1
    ans *= ans1
    ans %= PRIME
    fish[f] = 0
    fish[-1 / f] = 0
  elif -1 / f not in fish:
    cnt += fish[f]

ans *= pow(2, cnt, PRIME)
ans %= PRIME

ans += PRIME - 1
ans %= PRIME

print(ans)