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