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