#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 {
                    printf("15%%");}
                    return 0;
    
}