// editor3
#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 {
        printf("15%%");
    }
    return 0;
}