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