// editor3
#include<stdio.h>
void main()
{
    int years;
    scanf("%d",&years);
    if(years1<=5){
        printf("5%");}
    else if(years6<=10){
        printf("10%");}
    else if(years>10){
        printf("15%");}
    else{
        printf("Invalid input");
    }
    
}