n = int(input())
a = [None] * n
b = [None] * n
for i in range(n):
    a[i], b[i] = map(int, input().split())
m = int(input())
x = [None] * m
y = [None] * m
for i in range(m):
    x[i], y[i] = map(int, input().split())
bought = [0] * m
for i in range(n):
    for j in range(m):
        if x[j] <= a[i] and y[j] >= b[i]:
            bought[j] += 1
miracle = max(bought)
if miracle == 0:
    print(0)
    exit()
for i in range(m):
    if bought[i] == miracle:
        print(i + 1)