collatz sequence all in main

t04e20.collatz.cpp

// t04e20.collatz.cpp
// juanfc 2026-03-25
// 

#include <iostream>
using namespace std;

int main()
{
    int n;
    cin >> n;

    int steps = 0;
    cout << n;
    while (n != 1) {
        if (n % 2 == 0) {
            n /= 2;
        } else {
            n = 3 * n + 1;
        }
        cout << " " << n;
        steps++;
    }
    cout << "  (" << steps << " steps)" << endl;
    return 0;
}