import java.util.Scanner;

public class Main{
	
	
	public static void main(String[] args) {

		Scanner s = new Scanner(System.in);
		long num = s.nextLong();
		
		long sum = 0;
		for (long i = 1; i <= num; 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 s = new Scanner(System.in);
		long num = s.nextLong();
		
		long sum = 0;
		for (long i = 1; i <= num; i++) {
			if (i % 3 != 0 && i%5 != 0) {
				sum += i;
			}
			
		}
		
		System.out.println(sum);

	}
} Main public static void main(String[] args) {

		Scanner s = new Scanner(System.in);
		long num = s.nextLong();
		
		long sum = 0;
		for (long i = 1; i <= num; i++) {
			if (i % 3 != 0 && i%5 != 0) {
				sum += i;
			}
			
		}
		
		System.out.println(sum);

	} main {

		Scanner s = new Scanner(System.in);
		long num = s.nextLong();
		
		long sum = 0;
		for (long i = 1; i <= num; i++) {
			if (i % 3 != 0 && i%5 != 0) {
				sum += i;
			}
			
		}
		
		System.out.println(sum);

	} Scanner s = new Scanner(System.in); s new Scanner(System.in) long num = s.nextLong(); num s.nextLong() s.nextLong s long sum = 0; sum 0 for (long i = 1; i <= num; i++) {
			if (i % 3 != 0 && i%5 != 0) {
				sum += i;
			}
			
		} long i = 1; long i = 1; i 1 i <= num i num 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 s = new Scanner(System.in);
		long num = s.nextLong();
		
		long sum = 0;
		for (long i = 1; i <= num; i++) {
			if (i % 3 != 0 && i%5 != 0) {
				sum += i;
			}
			
		}
		
		System.out.println(sum);

	}
} public class Main{
	
	
	public static void main(String[] args) {

		Scanner s = new Scanner(System.in);
		long num = s.nextLong();
		
		long sum = 0;
		for (long i = 1; i <= num; 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 s = new Scanner(System.in);
		long num = s.nextLong();
		
		long sum = 0;
		for (long i = 1; i <= num; i++) {
			if (i % 3 != 0 && i%5 != 0) {
				sum += i;
			}
			
		}
		
		System.out.println(sum);

	}
}