import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long num = scan.nextLong();
		long sum = 0;
		for(int i = 1; i<=num; i++) {
			if(i%3==0||i%5==0) {

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

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

			}else{sum=sum+i;}
		}
		System.out.println(sum);
	} main {
		Scanner scan = new Scanner(System.in);
		long num = scan.nextLong();
		long sum = 0;
		for(int i = 1; i<=num; i++) {
			if(i%3==0||i%5==0) {

			}else{sum=sum+i;}
		}
		System.out.println(sum);
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) long num = scan.nextLong(); num scan.nextLong() scan.nextLong scan long sum = 0; sum 0 for(int i = 1; i<=num; i++) {
			if(i%3==0||i%5==0) {

			}else{sum=sum+i;}
		} int i = 1; int i = 1; i 1 i<=num i num i++ i++ i {
			if(i%3==0||i%5==0) {

			}else{sum=sum+i;}
		} {
			if(i%3==0||i%5==0) {

			}else{sum=sum+i;}
		} if(i%3==0||i%5==0) {

			}else{sum=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=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 public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long num = scan.nextLong();
		long sum = 0;
		for(int i = 1; i<=num; i++) {
			if(i%3==0||i%5==0) {

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

			}else{sum=sum+i;}
		}
		System.out.println(sum);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long num = scan.nextLong();
		long sum = 0;
		for(int i = 1; i<=num; i++) {
			if(i%3==0||i%5==0) {

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