#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;
        
}