#include<stdio.h>
int main(){
    int years;
    scanf("%d",&years);
    if(years<1){
        printf("Invalid Input");
        return 0;
    }
     if(years<=5){
        printf("5%%");
    }else if(years>5 && years=10){
        printf("10%%");
    }
    else{
        printf("15%%");
    }
}