N = int(input())
AB = [list(map(int, input().split())) for _ in range(N)]
M = int(input())
XY = [list(map(int, input().split())) for _ in range(M)]

counts = [0 for _ in range(M)]

for i in range(N):
    for j in range(M):
        if AB[i][0] >= XY[j][0] and AB[i][1] <= XY[j][1]:
            counts[j] += 1

x = max(counts)

if x == 0:
    print(0)
    exit()

for i in range(M):
    if x == counts[i]:
        print(i + 1)