#include <iostream>

using namespace std;

int main (void){
    int n, f = 1;
    cout << "Ingrese un numero entero positivo para calcular su factorial." <<endl;
    cin >> n;
    for (int i = n ; i > 1 ; i--){
         f = f * i;
    }
    cout << "El factorial de "<< n << " es " << f <<endl;
    system("pause");
    return 0;
}