import java.util.Scanner;
public class Main {

@SuppressWarnings("resource")
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%3!=0&&i%5!=0) {
			sum+=i;
		}
	}
	System.out.println(sum);
	}
} import java.util.Scanner; Scanner java.util public class Main {

@SuppressWarnings("resource")
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%3!=0&&i%5!=0) {
			sum+=i;
		}
	}
	System.out.println(sum);
	}
} Main @SuppressWarnings("resource")
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%3!=0&&i%5!=0) {
			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%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 {

@SuppressWarnings("resource")
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%3!=0&&i%5!=0) {
			sum+=i;
		}
	}
	System.out.println(sum);
	}
} public class Main {

@SuppressWarnings("resource")
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%3!=0&&i%5!=0) {
			sum+=i;
		}
	}
	System.out.println(sum);
	}
} Main
import java.util.Scanner;
public class Main {

@SuppressWarnings("resource")
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%3!=0&&i%5!=0) {
			sum+=i;
		}
	}
	System.out.println(sum);
	}
}
