n = int(input())

cond = []
for i in range(n):
    inp = list(map(int,input().split()))
    cond.append(inp)

m = int(input())
ment = []
for i in range(m):
    inp = list(map(int,input().split()))
    ment.append(inp)

cnt  = [0 for i in range(m)]
for l,i in enumerate(ment):
    for j in cond:
        if i[0] <= j[0] and i[1] >= j[1]:
            cnt[l] += 1
            
mx = max(cnt)
if mx == 0:
    print(0)
else:
    for i,j in enumerate(cnt):
        if j == mx:
            print(i+1)