import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
AB=[]
XY=[]
append=AB.append
for _ in range(n):
  a,b=map(int,input().split())
  append(a*10**9+b)
append=XY.append
m=int(input())
for _ in range(m):
  a,b=map(int,input().split())
  append(a*10**9+b)

def f(a,b):
  if a//10**9>=b//10**9 and a%10**9<=b%10**9:
    return True
  else:
    return False
Ans=[0]*m
for i in range(n):
  for j in range(m):
    if f(AB[i],XY[j]):
      Ans[j]+=1
ma=max(Ans)
if ma!=0:
  for i in range(m):
    if Ans[i]==ma:
      print(i+1)
else:
  print(0)