n = int(input())
a = []
b = []
for i in range(n):
	atemp,btemp = map(int,input().split())
	a.append(atemp)
	b.append(btemp)
m = int(input())
x = []
y = []
for i in range(m):
	xtemp,ytemp = map(int,input().split())
	x.append(xtemp)
	y.append(ytemp)
counter = [0 for i in range(m)]
for i in range(n):
	for k in range(m):
		if x[k] <= a[i] and y[k] >= b[i]:
			counter[k] += 1
ans = max(counter)
if ans == 0:
	print(0)
else:
	for i in range(m):
		if counter[i] == ans:
			print(i+1)