#! ruby
# yukicoder My Practice
# author: Leonardone @ NEETSDKASU

w = gets.to_i
D = gets.to_i

D.downto(2) do |d|
    doit = (w.to_f / (d ** 2).to_f).floor.to_i
    w -= doit
    if w < 1
        puts '0'
        exit
    end
end

puts w