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

int main()
{
  i = 1;
  x = 1;

  x = x * i; i = i + 1; // x=1  i=2
  x = x * i; i = i + 1; // x=1.2  i=3
  x = x * i; i = i + 1; // x=1.2.3  i=4
  x = x * i; i = i + 1; // x=1.2.3.4  i=5
  x = x * i; i = i + 1; // x=1.2.3.4.5  i=6

  cout << x << endl;
}