#include<stdi 1o.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 > 10){
        printf("15%%\n");
    }
    return 0;
}