N = int(input().strip())
A, B = [], []
for i in range(N):
  tmp = list(map(int, input().split()))
  A.append(tmp[0])
  B.append(tmp[1])

M = int(input().strip())
X, Y = [], []
for i in range(M):
  tmp = list(map(int, input().split()))
  X.append(tmp[0])
  Y.append(tmp[1])

lst = [0] * M

for n in range(len(X)):
  x, y = X[n], Y[n]
  for a, b in zip(A, B):
    if x <= a and y >= b:
      lst[n] += 1

m = max(lst)
cnt = 0
for n, i in enumerate(lst):
  if i == m and m > 0:
    print(n+1)
    cnt += 1

if cnt == 0:
  print(0)