N = int(input())
members = [tuple(map(int, input().split())) for _ in range(N)]
M = int(input())

count = [0] * M
for i in range(1, M):
    X, Y = map(int, input().split())
    count[i] = len([{a, b} for a, b in members if X <= a and Y >= b])

if max(count) == 0:
  print(0)
else:
  for x in [i for i in range(M) if count[i] == max(count)]:
    print(x)