def main():
    N = int(input())
    AB = tuple(tuple(map(int, input().split())) for _ in [0] * N)
    M = int(input())
    XY = tuple(tuple(map(int, input().split())) for _ in [0] * M)

    men = {i:0 for i in range(M + 1)}
    ab = sorted(AB, reverse=True)
    xy = sorted(XY)
    for i, (x, y) in enumerate(xy):
        for a, b in ab:
            if a >= x:
                if b <= y:
                    men[i+1] += 1
            else:
                break

    maxv = max(men.values())
    if maxv == 0:
        print(0)
    else:
        for i in [key for key in men if men[key] == maxv]:
            print(i)

main()