import java.io.*;

public class Main
{
	public static void main(String[] args)throws IOException
	{
		BufferedReader br =
		new BufferedReader(new InputStreamReader(System.in));
		
		String str=br.readLine();
		long sum=0;
		long num1=Long.parseLong(str);
		
		for(long i=0;i<=num1;i++){
			if(i%3!=0&&i%5!=0){
				sum+=i;
			}
		}
		
		System.out.println(sum);
	}
} import java.io.*; io.* java public class Main
{
	public static void main(String[] args)throws IOException
	{
		BufferedReader br =
		new BufferedReader(new InputStreamReader(System.in));
		
		String str=br.readLine();
		long sum=0;
		long num1=Long.parseLong(str);
		
		for(long i=0;i<=num1;i++){
			if(i%3!=0&&i%5!=0){
				sum+=i;
			}
		}
		
		System.out.println(sum);
	}
} Main public static void main(String[] args)throws IOException
	{
		BufferedReader br =
		new BufferedReader(new InputStreamReader(System.in));
		
		String str=br.readLine();
		long sum=0;
		long num1=Long.parseLong(str);
		
		for(long i=0;i<=num1;i++){
			if(i%3!=0&&i%5!=0){
				sum+=i;
			}
		}
		
		System.out.println(sum);
	} main {
		BufferedReader br =
		new BufferedReader(new InputStreamReader(System.in));
		
		String str=br.readLine();
		long sum=0;
		long num1=Long.parseLong(str);
		
		for(long i=0;i<=num1;i++){
			if(i%3!=0&&i%5!=0){
				sum+=i;
			}
		}
		
		System.out.println(sum);
	} BufferedReader br =
		new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str=br.readLine(); str br.readLine() br.readLine br long sum=0; sum 0 long num1=Long.parseLong(str); num1 Long.parseLong(str) Long.parseLong Long str for(long i=0;i<=num1;i++){
			if(i%3!=0&&i%5!=0){
				sum+=i;
			}
		} long i=0; long i=0; i 0 i<=num1 i num1 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)throws IOException
	{
		BufferedReader br =
		new BufferedReader(new InputStreamReader(System.in));
		
		String str=br.readLine();
		long sum=0;
		long num1=Long.parseLong(str);
		
		for(long i=0;i<=num1;i++){
			if(i%3!=0&&i%5!=0){
				sum+=i;
			}
		}
		
		System.out.println(sum);
	}
} public class Main
{
	public static void main(String[] args)throws IOException
	{
		BufferedReader br =
		new BufferedReader(new InputStreamReader(System.in));
		
		String str=br.readLine();
		long sum=0;
		long num1=Long.parseLong(str);
		
		for(long i=0;i<=num1;i++){
			if(i%3!=0&&i%5!=0){
				sum+=i;
			}
		}
		
		System.out.println(sum);
	}
} Main
import java.io.*;

public class Main
{
	public static void main(String[] args)throws IOException
	{
		BufferedReader br =
		new BufferedReader(new InputStreamReader(System.in));
		
		String str=br.readLine();
		long sum=0;
		long num1=Long.parseLong(str);
		
		for(long i=0;i<=num1;i++){
			if(i%3!=0&&i%5!=0){
				sum+=i;
			}
		}
		
		System.out.println(sum);
	}
}