N=int(input())
member=[]
for _ in range(N):
    A,B=map(int,input().split())
    member.append([A,B])
M=int(input())
kind=[]
for _ in range(M):
    X,Y=map(int,input().split())
    kind.append([X,Y])
cnt=0
M_cnt=[]
for i in range(M):
    X,Y=kind[i][0],kind[i][1]
    for k in range(N):
        if member[k][0]>=X and member[k][1]<=Y:
            cnt+=1
    M_cnt.append(cnt)
    cnt=0
max_cnt=max(M_cnt)
if max_cnt==0:
    print(0)
else:
    for i in range(M):
        if M_cnt[i]==max_cnt:
            print(i+1)