#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(years >=6 && years <=10){
        printf("10%%");
    }
    else if(years>10){
        printf("15%%");
    }
    return 0;
}