N,K = map(int, input().split())

if 2*K-1 <= N:
  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 2*K-1 <= N:
  print("YES")
else:
  print("NO") 2*K-1 <= N 2*K-1 2*K 2 K 1 N 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 2*K-1 <= N:
  print("YES")
else:
  print("NO")