N = int(input())
l = [input() for i in range(N)]

M = int(input())
l1 = [input() for i in range(M)]
ans = [0 for i in range(M)]

for i in l:
    A, B = map(int, i.split())
    for j in range(M):
        X, Y = map(int, l1[j].split())
        if X <= A and Y >= B:
            ans[j] += 1

K = max(ans)

if K == 0:
    print(0)
else:
    for i in range(M):
        if K == ans[i]:
            print(i + 1)