o = 0
k = int(input())
a = [0] * (65536*2)
for i in range(k):
    a[int(input()) + 32768] = 1
h = int(input())
for i in range(h):
    if a[10000 - int(input()) + 32768] != 0:
        o += 1
if o >= 1:
    print('YES')
else:
    print('NO')