#include <stdio.h>
void calculateBonus(int years){
    if (years < 1){
       printf("Invalid Input\n");
    } 
    else if (years >= 1 && years <= 5){
       printf("5%%\n");
    }
    else if (years >= 6 && years <= 10){
       printf("10%%\n");
    } 
    else if (years > 10 && years <= 40){
       printf("15%%\n");
    }
    else {
        printf("Invalid Input\n")
    }
}
int main(){
    int years;
    scanf("%d", &years);
    calculateBonus(years);
    return 0;
}