// editor3
#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 {
        printf("15%%");
    }
    retuen 0;
}