#define MAX__S 10000
#include "cmm.c"
main()
{
       INIT__S();
       R__0 = 1;
       scanf("%d",&R__1);
       if(R__1 <= 0) goto done;
       PUSH__S(R__1);
/* compute factorial */
       factorial();
compute:
       R__1 = POP__S();
       R__1 = R__1 - 2;
       if(R__1 <= 0) goto done;
       PUSH__S(R__1);
       R__0 = R__0 * R__1;
       goto compute;
done:
       printf("%d",R__0);
       printf("\n");
}
factorial()
{
       R__2 = 1;
loop:
       R__3 = POP__S();
       if(R__3 == 0) goto ends;
       R__2 = R__2 * R__3;
       R__3 = R__3 - 1;
       PUSH__S(R__3);
       goto loop;
ends:
       PUSH__S(R__2);
}