import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    n = int(input())
    ab = [tuple(map(int, input().split())) for _ in range(n)]
    m = int(input())
    xy = [tuple(map(int, input().split())) for _ in range(m)]
    cnt = [0] * m
    for a, b in ab:
        for i in range(m):
            x, y = xy[i]
            if x <= a and y >= b:
                cnt[i] += 1

    mx = max(cnt)
    if mx == 0:
        print(0)
        return
    for i in range(m):
        if cnt[i] == mx:
            print(i + 1)


if __name__ == '__main__':
    main()