import java.io.FileNotFoundException;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws FileNotFoundException {

//    	File file = new File("src/in.txt");

        //コード
//    	Scanner sc = new Scanner(file);
    	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);


    }
} import java.io.FileNotFoundException; FileNotFoundException java.io import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) throws FileNotFoundException {

//    	File file = new File("src/in.txt");

        //コード
//    	Scanner sc = new Scanner(file);
    	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);


    }
} Main public static void main(String[] args) throws FileNotFoundException {

//    	File file = new File("src/in.txt");

        //コード
//    	Scanner sc = new Scanner(file);
    	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);


    } main {

//    	File file = new File("src/in.txt");

        //コード
//    	Scanner sc = new Scanner(file);
    	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 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 FileNotFoundException {

//    	File file = new File("src/in.txt");

        //コード
//    	Scanner sc = new Scanner(file);
    	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);


    }
} public class Main {
    public static void main(String[] args) throws FileNotFoundException {

//    	File file = new File("src/in.txt");

        //コード
//    	Scanner sc = new Scanner(file);
    	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);


    }
} Main
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws FileNotFoundException {

//    	File file = new File("src/in.txt");

        //コード
//    	Scanner sc = new Scanner(file);
    	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);


    }
}
