import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();

        long sum = 0;
        for(int i = 1; i<=a; i++){
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        }
        System.out.println(sum);
    }
} import java.util.Scanner; Scanner java.util public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();

        long sum = 0;
        for(int i = 1; i<=a; i++){
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        }
        System.out.println(sum);
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();

        long sum = 0;
        for(int i = 1; i<=a; i++){
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        }
        System.out.println(sum);
    } main {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();

        long sum = 0;
        for(int i = 1; i<=a; i++){
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        }
        System.out.println(sum);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc long sum = 0; sum 0 for(int i = 1; i<=a; i++){
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        } int i = 1; int i = 1; i 1 i<=a i a i++ i++ i {
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        } {
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        } if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            } i % 3 != 0 && i % 5 != 0 i % 3 != 0 i % 3 i 3 0 i % 5 != 0 i % 5 i 5 0 {
                sum += i;
            } sum += i sum i System.out.println(sum) System.out.println System.out System System.out sum String[] args args public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();

        long sum = 0;
        for(int i = 1; i<=a; i++){
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        }
        System.out.println(sum);
    }
} public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();

        long sum = 0;
        for(int i = 1; i<=a; i++){
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        }
        System.out.println(sum);
    }
} Main
import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();

        long sum = 0;
        for(int i = 1; i<=a; i++){
            if(i % 3 != 0 && i % 5 != 0){
                sum += i;
            }
        }
        System.out.println(sum);
    }
}