/* package codechef; // don't place package name! */

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
   {
	try{
	    Scanner sc=new Scanner(System.in);
		  int n=sc.nextInt();
		  long sum=0;
		  for(int i=1;i<=n;i++)
		     {
		        if(i%3!=0 && i%5!=0 )
		         sum+=i;
		       
		          
		     }
		 System.out.println(sum);
	   }     
	catch(Exception e)
		 {}
	}
} 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
   {
	try{
	    Scanner sc=new Scanner(System.in);
		  int n=sc.nextInt();
		  long sum=0;
		  for(int i=1;i<=n;i++)
		     {
		        if(i%3!=0 && i%5!=0 )
		         sum+=i;
		       
		          
		     }
		 System.out.println(sum);
	   }     
	catch(Exception e)
		 {}
	}
} Main public static void main (String[] args) throws java.lang.Exception
   {
	try{
	    Scanner sc=new Scanner(System.in);
		  int n=sc.nextInt();
		  long sum=0;
		  for(int i=1;i<=n;i++)
		     {
		        if(i%3!=0 && i%5!=0 )
		         sum+=i;
		       
		          
		     }
		 System.out.println(sum);
	   }     
	catch(Exception e)
		 {}
	} main {
	try{
	    Scanner sc=new Scanner(System.in);
		  int n=sc.nextInt();
		  long sum=0;
		  for(int i=1;i<=n;i++)
		     {
		        if(i%3!=0 && i%5!=0 )
		         sum+=i;
		       
		          
		     }
		 System.out.println(sum);
	   }     
	catch(Exception e)
		 {}
	} try{
	    Scanner sc=new Scanner(System.in);
		  int n=sc.nextInt();
		  long sum=0;
		  for(int i=1;i<=n;i++)
		     {
		        if(i%3!=0 && i%5!=0 )
		         sum+=i;
		       
		          
		     }
		 System.out.println(sum);
	   }     
	catch(Exception e)
		 {} catch(Exception e)
		 {} Exception e {} {
	    Scanner sc=new Scanner(System.in);
		  int n=sc.nextInt();
		  long sum=0;
		  for(int i=1;i<=n;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) int n=sc.nextInt(); n sc.nextInt() sc.nextInt sc long sum=0; sum 0 for(int i=1;i<=n;i++)
		     {
		        if(i%3!=0 && i%5!=0 )
		         sum+=i;
		       
		          
		     } int i=1; int i=1; i 1 i<=n i n 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 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
   {
	try{
	    Scanner sc=new Scanner(System.in);
		  int n=sc.nextInt();
		  long sum=0;
		  for(int i=1;i<=n;i++)
		     {
		        if(i%3!=0 && i%5!=0 )
		         sum+=i;
		       
		          
		     }
		 System.out.println(sum);
	   }     
	catch(Exception e)
		 {}
	}
} public class Main
{
  public static void main (String[] args) throws java.lang.Exception
   {
	try{
	    Scanner sc=new Scanner(System.in);
		  int n=sc.nextInt();
		  long sum=0;
		  for(int i=1;i<=n;i++)
		     {
		        if(i%3!=0 && i%5!=0 )
		         sum+=i;
		       
		          
		     }
		 System.out.println(sum);
	   }     
	catch(Exception e)
		 {}
	}
} Main
/* package codechef; // don't place package name! */

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
   {
	try{
	    Scanner sc=new Scanner(System.in);
		  int n=sc.nextInt();
		  long sum=0;
		  for(int i=1;i<=n;i++)
		     {
		        if(i%3!=0 && i%5!=0 )
		         sum+=i;
		       
		          
		     }
		 System.out.println(sum);
	   }     
	catch(Exception e)
		 {}
	}
}
