n = int(input())
nl = [list(map(int, input().split())) for _ in range(n)]

m = int(input())
ml = [list(map(int, input().split())) for _ in range(m)]

ml2 = []
for i in range(len(ml)):
    ml2.append([i+1, ml[i][0], ml[i][1]])

l = []
for i, x, y in ml2:
    for a, b in nl:
        if x <= a and y >= b:
            l.append(i)

if len(l) == 0:
    print(0)
else:
    c = {}
    for i in l:
        if not i in c:
            c[i] = 1
        else:
            c[i] += 1
    x = max(c.values())

    l = []
    for i in c:
        if c[i] == x:
            print(i)