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