// editor1
#include<stdio.h>
int main(){
    if(scanf("%d",&years)!=1){
        printf("Invalid input");
        return 0;
    }
    if(years>=1 && years<=5){
        printf("5%%");
    }
    else if(years>=1 && years<=10){
        printf("10%%");
    }
    else if(years>10){
        printf("15%%");
    }
    else{
        printf("invalid input");
    }
    return 0;
}