#include<stdio.h>
#include<conio.h>
void main()
{
 long a;
 long n;
 long p;
 FILE *f,*g;
 a=0;n=1;
 f=fopen("fact.in","r");
 g=fopen("fact.out","w");
 fscanf(f,"%d",&p);
 if(a<p) n=0;

 printf("p=%d",n);

 while(a<p){
	long k;
	 n=n+5;
	 k=n;
	 while(k%5==0)
	 {
	 k=k/5;
	 a++;
	 }
 printf("%d %d\n",a,p);
 getch();
 }

 fprintf(g,"%d",n);
   fclose(f);
 fclose(g);

}