#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 
        if(years > 10){
            printf("15%%");
        }
       return 0;
   }