import java.util.ArrayList;
import java.util.Scanner;
public class Main{
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextInt();
		long ans=0;
		for(long i =1;i<=N;i++ ) {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		}
		System.out.println(ans);
		
		
	}
	
} import java.util.ArrayList; ArrayList java.util 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 ans=0;
		for(long i =1;i<=N;i++ ) {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		}
		System.out.println(ans);
		
		
	}
	
} Main public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextInt();
		long ans=0;
		for(long i =1;i<=N;i++ ) {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		}
		System.out.println(ans);
		
		
	} main {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextInt();
		long ans=0;
		for(long i =1;i<=N;i++ ) {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		}
		System.out.println(ans);
		
		
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long N = sc.nextInt(); N sc.nextInt() sc.nextInt sc long ans=0; ans 0 for(long i =1;i<=N;i++ ) {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		} long i =1; long i =1; i 1 i<=N i N i++ i++ i {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		} {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		} if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			} i%3==0 &&i%5==0 i%3==0 i%3 i 3 0 i%5==0 i%5 i 5 0 {
				
			} if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			} i%3==0 ||i%5==0 i%3==0 i%3 i 3 0 i%5==0 i%5 i 5 0 {
				
			} {
				ans = ans+i;
			} ans = ans+i ans ans+i ans i System.out.println(ans) System.out.println System.out System System.out ans String args[] args public class Main{
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextInt();
		long ans=0;
		for(long i =1;i<=N;i++ ) {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		}
		System.out.println(ans);
		
		
	}
	
} public class Main{
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextInt();
		long ans=0;
		for(long i =1;i<=N;i++ ) {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		}
		System.out.println(ans);
		
		
	}
	
} Main
import java.util.ArrayList;
import java.util.Scanner;
public class Main{
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextInt();
		long ans=0;
		for(long i =1;i<=N;i++ ) {
			if(i%3==0 &&i%5==0) {
				
			}else  if(i%3==0 ||i%5==0) {
				
			}else {
				ans = ans+i;
			}
		}
		System.out.println(ans);
		
		
	}
	
}
