import java.util.*;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	long sum = 0;
      	
      	for(int i=1;i<=n;i++){
			if(i%15==0){

            }else if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = sum+i;
            }
        }
      
      	System.out.println(sum);
    }
} import java.util.*; util.* java class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	long sum = 0;
      	
      	for(int i=1;i<=n;i++){
			if(i%15==0){

            }else if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = sum+i;
            }
        }
      
      	System.out.println(sum);
    }
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	long sum = 0;
      	
      	for(int i=1;i<=n;i++){
			if(i%15==0){

            }else if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = sum+i;
            }
        }
      
      	System.out.println(sum);
    } main {
		Scanner sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	long sum = 0;
      	
      	for(int i=1;i<=n;i++){
			if(i%15==0){

            }else if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = 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%15==0){

            }else if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = sum+i;
            }
        } int i=1; int i=1; i 1 i<=n i n i++ i++ i {
			if(i%15==0){

            }else if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = sum+i;
            }
        } {
			if(i%15==0){

            }else if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = sum+i;
            }
        } if(i%15==0){

            }else if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = sum+i;
            } i%15==0 i%15 i 15 0 {

            } if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = sum+i;
            } i%5==0 i%5 i 5 0 {

            } if(i%3==0){

            }else{
				sum = sum+i;
            } i%3==0 i%3 i 3 0 {

            } {
				sum = sum+i;
            } sum = sum+i sum sum+i sum i System.out.println(sum) System.out.println System.out System System.out sum String[] args args
import java.util.*;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	long sum = 0;
      	
      	for(int i=1;i<=n;i++){
			if(i%15==0){

            }else if(i%5==0){

            }else if(i%3==0){

            }else{
				sum = sum+i;
            }
        }
      
      	System.out.println(sum);
    }
}