#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;
}