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