#include <stdio.h>
int main ()
{
  int years;
  scanf("%d",&years);
  if(years<1)
 {
printf("Invalid Input");
        
 }
 else if(years>=1 && years <=5)
 {
printf("5%%") ;
            
 }
 else if(years>=6 && years <=10);
 {
 printf("10%%");
                
 }
 else{
                
 printf("15%%");
                    
 }
  return 0;
    
}