// 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%");
    }
    return 0;
}