Mindless Algebra

Suppose, 
a = 50 
b = 2000 
c = 40

Define a mathematical function Fun(n) that does the following: 
Fun(n) = n - c, if n > b 
Fun(n) = Fun(a + Fun(a + Fun(a + Fun(a + n)))), if n ≤ b.

Print result of calling this Fun() for n-1, n and n+1.

Input Format

N : an integer N >= 0

Output Format

R1 R2 R3 : 3 integers representing result of function calls - Fun(N-1), Fun(N), Fun(N+1).

Sample Input

2000

Sample Output

2039 2040 1961

Explanation

Well, that's mindless function output for inputs N = 1999, 2000 and 2001.

Program:

#include <cmath>

#include <cstdio>

#include <vector>

#include <iostream>

#include <algorithm>

using namespace std;

int Fun(int n)

{

    if(n>2000)

        return n-40;

    else

        return  Fun(50+ Fun(50 + Fun(50 + Fun(50 + n))));

}

int main() {

    int n;

    cin>>n;

    cout<<Fun(n-1)<<" "<<Fun(n)<<" "<<Fun(n+1);

        

    return 0;

}