def main():
  n=int(input())
  a, b=[0]*n, [0]*n
  for i in range(n):
    ai, bi=map(int, input().split())
    a[i], b[i]=ai, bi
  m=int(input())
  x, y=[0]*m, [0]*m
  for i in range(m):
    xi, yi=map(int, input().split())
    x[i], y[i]=xi, yi

  c=[0]*m
  for i in range(n):
    for j in range(m):
      if x[j]<=a[i] and y[j]>=b[i]:
        c[j]+=1

  mx=max(c)
  if mx==0:
    print(0)
  else:
    for i in range(m):
      if c[i]==mx:
        print(i)

if __name__ == '__main__':
  main()