N = int(input())
Lh = [list(map(int, input().split())) for _ in range(N)]
M = int(input())
Lm = [list(map(int, input().split())) + [i+1] for i in range(M)]
L = [0] * (M+1)

for a, b in Lh:
    for c, d, i in Lm:
        if a >= c and b <= d:
            L[i] += 1

X = max(L)
if X == 0:
    print(0)
else:
    if L.count(X) == 1:
        print(L.index(X))
    else:
        for i in range(M+1):
            if X == L[i]:
                print(i)