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