n,k=map(int,input().split())
if (n+1)//2>=k:print('YES')
else:print('NO') n,k=map(int,input().split()) n map(int,input().split()) map int input().split() ().split () input split k if (n+1)//2>=k:print('YES')
else:print('NO') (n+1)//2>=k (n+1)//2 n+1 n 1 2 k k=map(int,input().split()) map(int,input().split()) k n,k=map(int,input().split()) map(int,input().split()) n
n,k=map(int,input().split())
if (n+1)//2>=k:print('YES')
else:print('NO')