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

C = [0]*M
for a,b in AB :
    for i, xy in enumerate(XY) :
        x,y = xy
        if a >= x and b <= y :
            C[i] += 1

MAX = max(max(C))
if MAX == 0 :
    print(0)
else :
    for i,c in enumerate(C) :
        if c == MAX :
            print(i+1)