import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		long s=0;
		for(int i=1; i<=N; i++) {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		}
		System.out.println(s);
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		long s=0;
		for(int i=1; i<=N; i++) {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		}
		System.out.println(s);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		long s=0;
		for(int i=1; i<=N; i++) {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		}
		System.out.println(s);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		long s=0;
		for(int i=1; i<=N; i++) {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		}
		System.out.println(s);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc sc.close() sc.close sc long s=0; s 0 for(int i=1; i<=N; i++) {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		} int i=1; int i=1; i 1 i<=N i N i++ i++ i {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		} {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		} if(i%3==0 && i%5==0) continue; i%3==0 && i%5==0 i%3==0 i%3 i 3 0 i%5==0 i%5 i 5 0 continue; if(i%3==0) continue; i%3==0 i%3 i 3 0 continue; if(i%5==0) continue; i%5==0 i%5 i 5 0 continue; s+=i s i System.out.println(s) System.out.println System.out System System.out s String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		long s=0;
		for(int i=1; i<=N; i++) {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		}
		System.out.println(s);
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		long s=0;
		for(int i=1; i<=N; i++) {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		}
		System.out.println(s);
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		long s=0;
		for(int i=1; i<=N; i++) {
			if(i%3==0 && i%5==0) continue;
			if(i%3==0) continue;
			if(i%5==0) continue;
			s+=i;
		}
		System.out.println(s);
	}
}