// direct approach to calculate 5! (factorial of 5)
#include <iostream>
#include <math.h>
using namespace std;
int x, i;

int main()
{
  x = 1;

  i = 1; x = x * i; // x=1  
  i = 2; x = x * i; // x=1.2
  i = 3; x = x * i; // x=1.2.3
  i = 4; x = x * i; // x=1.2.3.4
  i = 5; x = x * i; // x=1.2.3.4.5

  cout << x << endl;
}