#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 (years>=10)
    {
       printf("15%%");
       
    }
    
    return 0;
}