import java.util.*;
import java.math.BigInteger;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
      	BigInteger sum = BigInteger.valueOf(0);
		for(int i=1;i<=a;i++){
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        }
      System.out.println(sum);
	}
} import java.util.*; util.* java import java.math.BigInteger; BigInteger java.math public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
      	BigInteger sum = BigInteger.valueOf(0);
		for(int i=1;i<=a;i++){
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        }
      System.out.println(sum);
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
      	BigInteger sum = BigInteger.valueOf(0);
		for(int i=1;i<=a;i++){
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        }
      System.out.println(sum);
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
      	BigInteger sum = BigInteger.valueOf(0);
		for(int i=1;i<=a;i++){
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        }
      System.out.println(sum);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc BigInteger sum = BigInteger.valueOf(0); sum BigInteger.valueOf(0) BigInteger.valueOf BigInteger 0 for(int i=1;i<=a;i++){
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        } int i=1; int i=1; i 1 i<=a i a i++ i++ i {
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        } {
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        } if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			} i%3!=0&&i%5!=0 i%3!=0 i%3 i 3 0 i%5!=0 i%5 i 5 0 {
				sum=sum.add(BigInteger.valueOf(i));
			} sum=sum.add(BigInteger.valueOf(i)) sum sum.add(BigInteger.valueOf(i)) sum.add sum BigInteger.valueOf(i) BigInteger.valueOf BigInteger 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){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
      	BigInteger sum = BigInteger.valueOf(0);
		for(int i=1;i<=a;i++){
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        }
      System.out.println(sum);
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
      	BigInteger sum = BigInteger.valueOf(0);
		for(int i=1;i<=a;i++){
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        }
      System.out.println(sum);
	}
} Main
import java.util.*;
import java.math.BigInteger;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
      	BigInteger sum = BigInteger.valueOf(0);
		for(int i=1;i<=a;i++){
			if(i%3!=0&&i%5!=0) {
				sum=sum.add(BigInteger.valueOf(i));
			}
        }
      System.out.println(sum);
	}
}