#include <stdio.h>
#include <math.h>
int main(){
	int p, N = 1, zece = 1, count = 1;
	FILE * f1;
	FILE * f2;
	f1 = fopen ("fact.in","r");
	f2 = fopen ("fact.out","w");
	fscanf (f1, "%d", &p);
    for(int i = 0; i < p; i++){
        zece *= 10;
    }
    do{
        N *= count;
        count++;
    }while (N%zece == 0);
	fprintf(f2,"%d\n", N);
	fflush(stdout);
	fclose(f1);
	fclose(f2);
	return 0;
}