#include <cstdio>
int p, t, p1, nr;
int nrcifre(int n){
  int aux=n, nr=0;
  while(aux){
	nr++;
	aux/=10;
  }
  return nr;
}
int putere(int n, int p){
  int aux=n, i;
  for(i=1;i<p;i++)
    aux*=n;
  return aux;
}
int main(){
  freopen("fact.in", "r", stdin);
  freopen("fact.out", "w", stdout);
  scanf("%d", &p);
  if (p==0)
    printf("1");
  else{
    t=p+1;
    p1=p-p/6-p/31-p/156-p/781-p/3906-p/19531-p/97656-p/488281-p/2441406-p/12207031-p/61035156-p/305175781;
    t=t-t/6-t/31-t/156-t/781-t/3906-t/19531-t/97656-t/488281-t/2441406-t/12207031-t/61035156-t/305175781;
    if (t==p)
	  printf("-1"); 
    else{
	  if(p<=100)
	    printf("%d", p1*5);
	  else{
		nr=p%100;
		nr/=10;
		printf("%d", (p1+nr)*5);
	  }
	}
  }
}