/*
 * factorials.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int ans [205], tmp [205];

void
fact (int N);

void
mult (int num);

void
copy (void);

int
main (void)
{
	int i, N, j;
	char s [100];

	while (gets (s) != NULL) {
		sscanf (s, "%d", &N);

		for (i = 0;i < 205; i++)
			ans [i] = tmp [i] = 0;

		ans [0] = 1;
		fact (N);

		j = 0;

		for (i = 204; i>= 0; i--) {
			if (!j && ans [i] != 0)
				j = 1;

			if (j)
				printf ("%d", ans [i]);
		}

		printf ("\n");
	}

	return 0;
}

void
fact (int N)
{
	int i;

	for (i = 0; i < N; i++) {
		mult  (i + 1);
	}

}

void
mult (int num)
{
	int i, c, dig, foo, j, start, k;

	start = 0;
	
	while (num) {
		j = start;

		dig = num % 10;
		num /= 10;
		c = 0;

		for (i = 0; i < 205; i++) {
			foo = ans [i];
			foo = foo * dig + c;
			tmp [j] = foo % 10 + tmp [j];  
			k = j + 1;

			while ((tmp [k - 1] % 10) != tmp [k - 1]) {
				tmp [k] += (tmp [k - 1] / 10);
				tmp [k - 1] %= 10;
				k++;
			}

			c = foo / 10;
			j++;
		}

		start++;
	}

	copy ();
}

void
copy (void)
{
	int i;

	for (i = 0; i < 205; i++) {
		ans [i] = tmp [i];
		tmp [i] = 0;
	}
}