#include<stdio.h>   
FILE *f,*g;   
int main()   
{   
f=fopen("fact.in","r");   
g=fopen("fact.out","w");   
long int p,i,aux,j;   
int a[10000];   
fscanf(f,"%ld",&p);   
if(p==0) { i=1; fprintf(g,"%ld",i); }   
 else if(p<0) {i=-1; fprintf(g,"%ld",i); }   
 else {    
       i=0;   
       aux=p;      
      while(p!=0)   
       {   
         a[i]=p%10;
         p=p/10;
         i++;
       }
       for(j=0;j<aux;j++)
         {
           a[j]=a[i]
           i--;
         } 
 
for(i=0;i<aux;i++)          
 {
 a[i]=a[i]*5;
 if(a[i]>10) { a[i]=a[i]-10; a[i+1]++; }
 }
 for(j=0;j<aux;j++)   
           {   
                   fprintf(g,"%d",a[j]);   
           }   
       }      
return 0;   
}