
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		List<Integer> list = new ArrayList<>();

		for ( int i = 1; i <= n; i ++){
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		}

		long sum = 0;
		for (int f : list){
			sum += f;
		}

		System.out.println(sum);

	}

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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		List<Integer> list = new ArrayList<>();

		for ( int i = 1; i <= n; i ++){
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		}

		long sum = 0;
		for (int f : list){
			sum += f;
		}

		System.out.println(sum);

	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		List<Integer> list = new ArrayList<>();

		for ( int i = 1; i <= n; i ++){
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		}

		long sum = 0;
		for (int f : list){
			sum += f;
		}

		System.out.println(sum);

	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		List<Integer> list = new ArrayList<>();

		for ( int i = 1; i <= n; i ++){
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		}

		long sum = 0;
		for (int f : list){
			sum += f;
		}

		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 List<Integer> list = new ArrayList<>(); list new ArrayList<>() for ( int i = 1; i <= n; i ++){
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		} int i = 1; int i = 1; i 1 i <= n i n i ++ i ++ i {
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		} {
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		} if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			} i % 3 == 0 i % 3 i 3 0 {
				continue;
			} continue; if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			} i % 5 == 0 i % 5 i 5 0 {
				continue;
			} continue; {
				list.add(i);
			} list.add(i) list.add list i long sum = 0; sum 0 for (int f : list){
			sum += f;
		} int f list {
			sum += f;
		} {
			sum += f;
		} sum += f sum f 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 n = sc.nextInt();
		List<Integer> list = new ArrayList<>();

		for ( int i = 1; i <= n; i ++){
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		}

		long sum = 0;
		for (int f : list){
			sum += f;
		}

		System.out.println(sum);

	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		List<Integer> list = new ArrayList<>();

		for ( int i = 1; i <= n; i ++){
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		}

		long sum = 0;
		for (int f : list){
			sum += f;
		}

		System.out.println(sum);

	}

} Main

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		List<Integer> list = new ArrayList<>();

		for ( int i = 1; i <= n; i ++){
			if (i % 3 == 0){
				continue;
			} else if (i % 5 == 0){
				continue;
			} else {
				list.add(i);
			}
		}

		long sum = 0;
		for (int f : list){
			sum += f;
		}

		System.out.println(sum);

	}

}
