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

if (N + 1) // 2 >= K:
    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 + 1) // 2 >= K:
    print("YES")
else:
    print("NO") (N + 1) // 2 >= K (N + 1) // 2 N + 1 N 1 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
N, K = map(int, input().split())

if (N + 1) // 2 >= K:
    print("YES")
else:
    print("NO")
