n=int(input())
ab=[list(map(int,input().split())) for i in'.'*n]
m=int(input())
xy=[list(map(int,input().split())) for i in'.'*m]
d=[]
for i in xy:
  c=0
  for j in ab:
    c+=((i[0]<=j[0] and i[1]>=j[1]))
  d+=[c]
for i in range(m):
  if max(d)==0:
    print(0)
    break
  if d[i]==max(d):
    print(i+1)