#include <iostream>
using namespace std;
int main()
{
    int p=0, p2=1, n;
    cout << "Saisissez le nombre dont on cherche la factorielle" << endl << endl;
    cin >> n;
    while (p != (n-1))
    {
        p = p+1;
        p2 = p2 * (n-p);
    }
    p2 = p2 * n;
    cout << "La factorielle est " << p2;
}