n = int(input())
a = [list(map(int, input().split())) for i in range(n)]
m = int(input())
b = [list(map(int, input().split())) for i in range(m)]
l = [0]*(10**3+10)

for i in a:
  for j in range(m):
    if i[0] >= b[j][0] and i[1] <= b[j][1]:
      l[j+1] += 1
temp = max(l)
if temp == 0:
  print(temp)
else:
  for i in range(len(l)):
    if l[i] == temp:
      print(i)