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