k=gets.to_i
a=(0..k).bsearch{|e|e*~-e/2>=k}
d=k-a*~-a/2
b=(0..d).bsearch{|e|e*~-e/2>=d}
c=k-b*~-b/2
p a+c+1
puts [*[1]*(a-b),*[2]*b,*[7]*c,24]*' '