a,b=zip(*[[*map(int,input().split())] for _ in range(int(input()))])
x,y=zip(*[[*map(int,input().split())] for _ in range(int(input()))])
cnt=[0]*len(x)
for i in range(len(a)):
    for j in range(len(x)):
        if a[i]>=x[j] and b[i]<=y[j]:
            cnt[j]+=1
max_num=0
for i in range(len(x)):
    max_num=max(max_num,cnt[i])
if max_num==0:
    print(0)
else:
    for i in range(len(x)):
        if cnt[i]==max_num:
            print(i+1)