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