#include <iostream>
#include <string>

using namespace std;

int main()

{ // start main function

int alpha;
int countdown;

cout << "Enter number to countdown from: ";
cin >> countdown;

for (alpha=0; alpha<=countdown; countdown--)
    {
    cout << "Countdown at: " << countdown << endl;
    if (countdown==0)
        cout << "Liftoff!";
    }  // end for loop


return 0;

} // end main function