/* 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
	{
	   long sum = 0;
		Scanner input = new Scanner(System.in);
		long n = input.nextLong();
		
		for(long i=1;i<=n;i++){
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        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
	{
	   long sum = 0;
		Scanner input = new Scanner(System.in);
		long n = input.nextLong();
		
		for(long i=1;i<=n;i++){
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    }
		    
		}
		System.out.println(sum);
	}
} Main public static void main (String[] args) throws java.lang.Exception
	{
	   long sum = 0;
		Scanner input = new Scanner(System.in);
		long n = input.nextLong();
		
		for(long i=1;i<=n;i++){
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    }
		    
		}
		System.out.println(sum);
	} main {
	   long sum = 0;
		Scanner input = new Scanner(System.in);
		long n = input.nextLong();
		
		for(long i=1;i<=n;i++){
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    }
		    
		}
		System.out.println(sum);
	} long sum = 0; sum 0 Scanner input = new Scanner(System.in); input new Scanner(System.in) long n = input.nextLong(); n input.nextLong() input.nextLong input for(long i=1;i<=n;i++){
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    }
		    
		} long i=1; long i=1; i 1 i<=n i n i++ i++ i {
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    }
		    
		} {
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    }
		    
		} if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    } i%3==0 && i%5==0 i%3==0 i%3 i 3 0 i%5==0 i%5 i 5 0 {
		      // System.out.println("FizzBuzz");
		    } if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    } i%3==0 i%3 i 3 0 {
		       //System.out.println("Fizz");
		    } if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    } i%5==0 i%5 i 5 0 {
		        //System.out.println("Buzz");
		    } {
		        //System.out.println(i);
		        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 java.lang.Exception
	{
	   long sum = 0;
		Scanner input = new Scanner(System.in);
		long n = input.nextLong();
		
		for(long i=1;i<=n;i++){
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    }
		    
		}
		System.out.println(sum);
	}
} public class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
	   long sum = 0;
		Scanner input = new Scanner(System.in);
		long n = input.nextLong();
		
		for(long i=1;i<=n;i++){
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    }
		    
		}
		System.out.println(sum);
	}
} 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
	{
	   long sum = 0;
		Scanner input = new Scanner(System.in);
		long n = input.nextLong();
		
		for(long i=1;i<=n;i++){
		    if(i%3==0 && i%5==0){
		      // System.out.println("FizzBuzz");
		    }else if(i%3==0){
		       //System.out.println("Fizz");
		    }else if(i%5==0){
		        //System.out.println("Buzz");
		    }
		    else{
		        //System.out.println(i);
		        sum+=i;
		    }
		    
		}
		System.out.println(sum);
	}
}
