
import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner input = new Scanner(System.in);
		int n = input.nextInt();
		
		long sum = 0;
		
		for(int i=1;i<=n;i++){
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		}
		
		System.out.println(sum);
	}
} import java.util.*; util.* java import java.lang.*; lang.* java import java.io.*; io.* java public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner input = new Scanner(System.in);
		int n = input.nextInt();
		
		long sum = 0;
		
		for(int i=1;i<=n;i++){
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		}
		
		System.out.println(sum);
	}
} Main public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner input = new Scanner(System.in);
		int n = input.nextInt();
		
		long sum = 0;
		
		for(int i=1;i<=n;i++){
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		}
		
		System.out.println(sum);
	} main {
		// your code goes here
		Scanner input = new Scanner(System.in);
		int n = input.nextInt();
		
		long sum = 0;
		
		for(int i=1;i<=n;i++){
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		}
		
		System.out.println(sum);
	} Scanner input = new Scanner(System.in); input new Scanner(System.in) int n = input.nextInt(); n input.nextInt() input.nextInt input long sum = 0; sum 0 for(int i=1;i<=n;i++){
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		} int i=1; int i=1; i 1 i<=n i n i++ i++ i {
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		} {
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		} if(i%3==0||i%5==0) continue;
		    else sum+=i; i%3==0||i%5==0 i%3==0 i%3 i 3 0 i%5==0 i%5 i 5 0 continue; 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) throws java.lang.Exception
	{
		// your code goes here
		Scanner input = new Scanner(System.in);
		int n = input.nextInt();
		
		long sum = 0;
		
		for(int i=1;i<=n;i++){
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		}
		
		System.out.println(sum);
	}
} public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner input = new Scanner(System.in);
		int n = input.nextInt();
		
		long sum = 0;
		
		for(int i=1;i<=n;i++){
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		}
		
		System.out.println(sum);
	}
} Main

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner input = new Scanner(System.in);
		int n = input.nextInt();
		
		long sum = 0;
		
		for(int i=1;i<=n;i++){
		    if(i%3==0||i%5==0) continue;
		    else sum+=i;
		}
		
		System.out.println(sum);
	}
}
