import java.util.Scanner;

public class Kol2 {
    public static  void main(String[] a){
        Scanner sc = new Scanner(System.in);
        System.out.println("Vpiši eno številio ");
        int ena = sc.nextInt();
        int rez = 0;
        for(int i = 1; i <= ena; i++){
            if(i % 5 == 0){
                rez = rez + i;
            }
        }
        System.out.println("Rezultat je: " + rez);
    }
}