// editor3
#include <stdio.h>
int main()
{
    int years;
    scanf("%d",years);
    if(years<1)
    {
        printf("\nInvalid input");
    }
    else if(years>=1&&years<=5)
    {
        printf("\n5%%");
    }
    else if(years>=6&&years<=10)
    {
        printf("\n10%%");
    }
    else if(years>10)
    {
        printf("\n15%%");
    }
    
}