N = int(input())
A = [0]*N
B = [0]*N
for i in range(N):
    a,b = map(int,input().split())
    A[i]=a
    B[i]=b
M = int(input())
X = [0]*M
Y = [0]*M
BUY = [0]*M
for i in range(M):
    x,y = map(int,input().split())
    X[i]=x
    Y[i]=y
for n in range(N):
    for m in range(M):
        if A[n]>=X[m] and B[n]<=Y[m]:
            BUY[m]+=1
maxbuy = max(BUY)
if maxbuy==0:
    print(0)
else:
    for i in range(M):
        if maxbuy==BUY[i]:
            print(i+1)