n = int(input())
pab = [list(map(int, input().split())) for i in range(n)]
m = int(input())
pxy = [list(map(int, input().split())) for i in range(m)]
pc = [0 for i in range(m)]
for i in range(n):
    for j in range(m):
        if pab[i][0] >= pxy[j][0] and pab[i][1] <= pxy[j][1]:
            pc[j] += 1
cMax = max(pc)
if cMax == 0:
    print(0)
else:
    for i in range(m):
        if pc[i] == cMax:
            print(i + 1)