n,k=map(int,input().split())
if (n%2==0 and k <=n//2) or (n%2==1 and k <= (n+1)//2):
  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==0 and k <=n//2) or (n%2==1 and k <= (n+1)//2):
  print("YES")
else:
  print("NO") (n%2==0 and k <=n//2) or (n%2==1 and k <= (n+1)//2) n%2==0 and k <=n//2 n%2==0 n%2 n 2 0 k <=n//2 k n//2 n 2 n%2==1 and k <= (n+1)//2 n%2==1 n%2 n 2 1 k <= (n+1)//2 k (n+1)//2 n+1 n 1 2 print("YES") print "YES" print("NO") print "NO" 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%2==0 and k <=n//2) or (n%2==1 and k <= (n+1)//2):
  print("YES")
else:
  print("NO")