#include<stdio.h>
int main()
{
    int years;
    scanf("%d",&years);
    
    if(years<1)
    {  
       printf("Invaid 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;
}