#include<stdio.h>
int main()
{
  long k,p,i,m;
  FILE*f=fopen("fact.in","r");
  FILE*g=fopen("fact.out","w");
  fprintf(f,"%ld",&p);
  k=0;
  i=0;
  while (k<p)
    { i+=5;;
      m=i;
      while (m%5==0){ m=m/5; k++;}}
  if (k==0) fprintf(g,"1");
   else fprintf(f,"%ld ",g); 
 
  return 0;}