import math

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