import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        new Main().solve();
    }


    void solve() {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        sc.close();

        long sum = 0;
        for(int i=1; i<= N; i++){
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        }

        System.out.println(sum);


    }
}    
 import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        new Main().solve();
    }


    void solve() {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        sc.close();

        long sum = 0;
        for(int i=1; i<= N; i++){
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        }

        System.out.println(sum);


    }
} Main public static void main(String[] args) {
        new Main().solve();
    } main {
        new Main().solve();
    } new Main().solve() new Main().solve new Main() String[] args args void solve() {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        sc.close();

        long sum = 0;
        for(int i=1; i<= N; i++){
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        }

        System.out.println(sum);


    } solve {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        sc.close();

        long sum = 0;
        for(int i=1; i<= N; i++){
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        }

        System.out.println(sum);


    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc sc.close() sc.close sc long sum = 0; sum 0 for(int i=1; i<= N; i++){
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        } int i=1; int i=1; i 1 i<= N i N i++ i++ i {
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        } {
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        } if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            } i % 3 == 0 i % 3 i 3 0 {
            } if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            } i % 5 == 0 i % 5 i 5 0 {
            } if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            } i % 15 == 0 i % 15 i 15 0 {
            } {
                sum = sum + i;
            } sum = sum + i sum sum + i sum i System.out.println(sum) System.out.println System.out System System.out sum public class Main {

    public static void main(String[] args) {
        new Main().solve();
    }


    void solve() {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        sc.close();

        long sum = 0;
        for(int i=1; i<= N; i++){
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        }

        System.out.println(sum);


    }
} public class Main {

    public static void main(String[] args) {
        new Main().solve();
    }


    void solve() {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        sc.close();

        long sum = 0;
        for(int i=1; i<= N; i++){
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        }

        System.out.println(sum);


    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        new Main().solve();
    }


    void solve() {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        sc.close();

        long sum = 0;
        for(int i=1; i<= N; i++){
            if(i % 3 == 0){
            }
            else if(i % 5 == 0){
            }
            else if(i % 15 == 0){
            }
            else {
                sum = sum + i;
            }
        }

        System.out.println(sum);


    }
}    

