Problem:
Score : 300 points

Problem Statement

You are given an integer N.

Find a triple of positive integers h, n and w such that 4/N = 1/h + 1/n + 1/w.

If there are multiple solutions, any of them will be accepted.

Constraints

It is guaranteed that, for the given integer N, there exists a solution such that h,n,w \leq 3500.

Inputs

Input is given from Standard Input in the following format:

N

Outputs

Print a triple of positive integers h, n and w that satisfies the condition, in the following format:

h n w

Sample Input 1

2

Sample Output 1

1 2 2

4/2 = 1/1 + 1/2 + 1/2.

Sample Input 2

3485

Sample Output 2

872 1012974 1539173474040

It is allowed to use an integer exceeding 3500 in a solution.

Sample Input 3

4664

Sample Output 3

3498 3498 3498

Solution in Ruby (2.3.3) (judge verdict: Accepted)

def inp() a=gets.to_s.chomp.split(" ").map{|u|u.to_i}end
def r_up(a, b) (a+b-1)/b end
def r_sort(a) a.sort{|a,b|b<=>a} end

bn = inp[0]
(1..3500).each do |h|
  (1..3500).each do |n|
    si = bn*h*n
    bo = (4*h*n - bn*h - bn*n)
    next if(si <= 0)
    next if(bo <= 0)
    if(si % bo == 0)
      r = si / bo
      puts "#{h} #{n} #{r}"
      exit
    end
  end
end