from collections import Counter

n = int(input())
mem = []
mcl = []
for i in range(n):
    array = list(map(int, input().split()))
    mem.append(array)

m = int(input())
men = []

for i in range(m):
    array = list(map(int, input().split()))
    men.append(array)


for i in range(n):
    for j in range(m):
        if mem[i][0] >= men[j][0] and mem[i][1] <= men[j][1]:
            mcl.append(j)

c = Counter(mcl)
g = c.most_common()

if len(g) == 0:
    print(0)

for i in range(len(g)):
    if g[i][1] == g[0][1]:
        print(g[i][0] + 1)