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