#include <stdio.h>
int main(){
    int years;
    scanf("%d",&years);
    if(years >= 1 && years <=5){
        printf("5%%");
    }
    else if (years >=6 && years <=10){
        print("10%%");
        
    }else if(years > 10 && years <=40){
        printf("15%%");
        
    }else{
        printf("Invalid Input");
    }
    return 0;
}