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