// editor2
#include<stdio.h>
void main ()
{
    int year;
    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%%");
}
}