n = int(input())

ans = [0] * n

for i in range(n):
    a, b = map(int, input().split())
    ans[i] = [a, b]

m = int(input())
r = [0] * (m+1)

for i in range(m):
    x, y = map(int, input().split())
    for a, b in ans:
        if a >= x and b <= y:
            r[i+1] += 1

t = max(r)

if t == 0:
    print(0)
else:
    for i in range(1, m+1):
        if t == r[i]:
            print(i)