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