#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main()
{
int fac = 1;
int num = 0;
scanf("%d", &num);
int i = 1;
for (i = 1; i <= num; i++)
{
fac = fac * i;
}
printf("%d", fac);
return 0;
}
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main()
{
int fac = 1;
int num = 0;
scanf("%d", &num);
int i = 1;
for (i = 1; i <= num; i++)
{
fac = fac * i;
}
printf("%d", fac);
return 0;
}