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