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