N,K=map(int,input().split())
assert (1<=N<=1000 and 1<=K<=1000),"NO"
C=list(map(int,input().split()))
D=list(map(int,input().split()))
assert (len(C)==N and len(D)==N),"NO"
for i in range(N):
    assert(1<=C[i]<=1000 and 1<=D[i]<=1000),"NO"