#include<stdio.h>
int main(){
    int years;
    scanf("%d",&years);
    if(a<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;
}