member = []
for _ in range(int(input())):
    a, b = map(int, input().split())
    member.append([a, b])
item = []
for _ in range(int(input())):
    a, b = map(int, input().split())
    item.append([a, b, 0])
max = 0
for [a, b] in member:
    for i in range(len(item)):
        x, y, z = item[i]
        if a >= x and b <= y:
            item[i] = [x, y, z + 1]
            if max < z + 1:
                max = z + 1
count = 0
if max == 0:
    print(0)
else:
    for i in range(len(item)):
        x, y, z = item[i]
        if z == max:
            print(i + 1)