import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long N = sc.nextInt();

        long sum = 0;
        for (long i = 1; i <= N; 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);
        long N = sc.nextInt();

        long sum = 0;
        for (long i = 1; i <= N; 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);
        long N = sc.nextInt();

        long sum = 0;
        for (long i = 1; i <= N; i ++) {
            if (i % 3 > 0 && i % 5 > 0) {
                sum += i;
            }
        }

        System.out.println(sum);
    } main {
        Scanner sc = new Scanner(System.in);
        long N = sc.nextInt();

        long sum = 0;
        for (long i = 1; i <= N; 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) long N = sc.nextInt(); N sc.nextInt() sc.nextInt sc long sum = 0; sum 0 for (long i = 1; i <= N; i ++) {
            if (i % 3 > 0 && i % 5 > 0) {
                sum += i;
            }
        } long i = 1; long i = 1; i 1 i <= N i N 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);
        long N = sc.nextInt();

        long sum = 0;
        for (long i = 1; i <= N; 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);
        long N = sc.nextInt();

        long sum = 0;
        for (long i = 1; i <= N; 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);
        long N = sc.nextInt();

        long sum = 0;
        for (long i = 1; i <= N; i ++) {
            if (i % 3 > 0 && i % 5 > 0) {
                sum += i;
            }
        }

        System.out.println(sum);
    }
}