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