
import java.util.Scanner;

public class Main {

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

}
