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 (2.7.1) (judge verdict: Accepted)

N=gets.to_i
x = 3500
1.upto(x) do |i|
    i.upto(x) do |j|
        # r = Rational(4,N) - Rational(1,i) - Rational(1,j)
        r = Rational(4*i*j-N*j-N*i,N*i*j)
        if r.numerator == 1
            puts [i,j,r.denominator].join(' ')
            exit
        end
    end
end