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