# coding: utf-8
# Your code here!

n = int(input())
a = []
b = []
for i in range(n):
    ai,bi=[int(i) for i in input().split()]
    a.append(ai)
    b.append(bi)
m = int(input())
x = []
y = []
for i in range(m):
    xi,yi=[int(i) for i in input().split()]
    x.append(xi)
    y.append(yi)

count = [0] * m

for i in range(n):
    price = a[i]
    hot = b[i]
    
    for j in range(m):
        if x[j] <= price and y[j] >= hot:
            count[j] += 1

max_tarako = max(count)

if max_tarako != 0:
    max_index = [i for i, x in enumerate(count) if x == max_tarako]
    
    for i in range(len(max_index)):
        print(max_index[i]+1)
else:
    print(0)