#include <stdio.h>
int main()
{  int years;
   scanf("%d",&years);
   if (year<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;
}