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