def compare(a,b):
  # 比較関数 (a<=b)
  
  # 偏角ソート
  ax, ay = a
  bx, by = b
  if ay < 0:
    return by >= 0 or ax * by - ay * bx > 0
  if ay == 0:
    return ax >= 0 and (by > 0 or (by == 0 and bx < 0))
  return by >= 0 and (ax * by - ay * bx) > 0


def merge(l, r):
    new = []
    ln = 0
    rn = 0
    while ln < len(l) and rn < len(r):
        if compare(l[ln],r[rn]):
            new.append(l[ln])
            ln += 1
        else:
            new.append(r[rn])
            rn += 1
    for i in range(ln, len(l)):
        new.append(l[i])
    for i in range(rn, len(r)):
        new.append(r[i])
    return new
 
def MergeSort(l):
    if len(l) == 0:
        return []
    if len(l) == 1:
        return l
    else:
        a = l[:len(l)//2]
        b = l[len(l)//2:]
        return merge(MergeSort(a), MergeSort(b))

n=int(input())
xy=[]
for i in range(n):
  x,y=map(int,input().split())
  if x==y==0:
    continue
  if y<0:
    x,y=-x,-y
  xy.append((x,y))
xy=MergeSort(xy)
m=len(xy)

XY=[(0,0)]
cumx,cumy=0,0
for x,y in xy:
  cumx+=x
  cumy+=y
  XY.append((cumx,cumy))

cumx,cumy=0,0
for x,y in xy[::-1]:
  cumx+=x
  cumy+=y
  XY.append((cumx,cumy))

def cross3(a, b, c):
    return (b[0]-a[0])*(c[1]-a[1]) - (b[1]-a[1])*(c[0]-a[0])
 
# ps = [(x, y), ...]: ソートされた座標list
def convex_hull(ps):
    qs = []
    N = len(ps)
    for p in ps:
        # 一直線上で高々2点にする場合は ">=" にする
        while len(qs) > 1 and cross3(qs[-1], qs[-2], p) >= 0:
            qs.pop()
        qs.append(p)
    t = len(qs)
    for i in range(N-2, -1, -1):
        p = ps[i]
        while len(qs) > t and cross3(qs[-1], qs[-2], p) > 0:
            qs.pop()
        qs.append(p)
    return qs

from math import gcd

XY.sort()
ch=convex_hull(XY)
m=len(ch)-1
area=0
point_cnt=0
use_cnt=0
for i in range(m):
  x1,y1=ch[i]
  x2,y2=ch[i+1]
  area+=x1*y2-x2*y1
  point_cnt+=gcd(x1-x2,y1-y2)
point_cnt2=(area-point_cnt)//2+1
ans=point_cnt+point_cnt2
print(ans%(10**9+7))