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