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