N = int(input())
lsAB = [tuple(map(int,input().split())) for i in range(N)]
M = int(input())
lsXY = [tuple(map(int,input().split())) for i in range(M)]
cnt = [0]*(M)
for i in range(N):
    a,b = lsAB[i]
    for j in range(M):
        x,y = lsXY[j]
        if x <= a and y >= b:
            cnt[j] += 1
maxj = max(cnt)
if maxj == 0:
    print(0)
    exit()

for i in range(M):
    if cnt[i] == maxj:
        print(i+1)