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