import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner a = new Scanner(System.in);		
		int b = a.nextInt();
		long sum = 0;
		for(int i = 1; i <= b; i++) {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		}
		System.out.println(sum);
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner a = new Scanner(System.in);		
		int b = a.nextInt();
		long sum = 0;
		for(int i = 1; i <= b; i++) {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		}
		System.out.println(sum);
	}
} Main public static void main(String[] args) {
		Scanner a = new Scanner(System.in);		
		int b = a.nextInt();
		long sum = 0;
		for(int i = 1; i <= b; i++) {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		}
		System.out.println(sum);
	} main {
		Scanner a = new Scanner(System.in);		
		int b = a.nextInt();
		long sum = 0;
		for(int i = 1; i <= b; i++) {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		}
		System.out.println(sum);
	} Scanner a = new Scanner(System.in); a new Scanner(System.in) int b = a.nextInt(); b a.nextInt() a.nextInt a long sum = 0; sum 0 for(int i = 1; i <= b; i++) {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		} int i = 1; int i = 1; i 1 i <= b i b i++ i++ i {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		} {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		} if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			} i % 15 == 0 i % 15 i 15 0 {
				
			} if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			} i % 3 == 0 i % 3 i 3 0 {
				
			} if(i % 5 == 0) {
				
			}else {
				sum += i;
			} 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) {
		Scanner a = new Scanner(System.in);		
		int b = a.nextInt();
		long sum = 0;
		for(int i = 1; i <= b; i++) {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		}
		System.out.println(sum);
	}
} public class Main {

	public static void main(String[] args) {
		Scanner a = new Scanner(System.in);		
		int b = a.nextInt();
		long sum = 0;
		for(int i = 1; i <= b; i++) {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		}
		System.out.println(sum);
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner a = new Scanner(System.in);		
		int b = a.nextInt();
		long sum = 0;
		for(int i = 1; i <= b; i++) {
			if(i % 15 == 0) {
				
			}else if(i % 3 == 0) {
				
			}else if(i % 5 == 0) {
				
			}else {
				sum += i;
			}
		}
		System.out.println(sum);
	}
}