import java.util.Scanner;

public class Main {

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

		
		System.out.println(sum);
	}
} 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();
		
		long sum = 0;
		
		for(int i = 1; i <= n; i++) {
			if(i % 3 == 0) {
				continue;
			} else if (i % 5 == 0) {
				continue;
			} else {
				sum+=i;
			}
		}

		
		System.out.println(sum);
	}
} Main 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) {
				continue;
			} else if (i % 5 == 0) {
				continue;
			} else {
				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) {
				continue;
			} else if (i % 5 == 0) {
				continue;
			} else {
				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) {
				continue;
			} else if (i % 5 == 0) {
				continue;
			} else {
				sum+=i;
			}
		} int i = 1; int i = 1; i 1 i <= n i n i++ i++ i {
			if(i % 3 == 0) {
				continue;
			} else if (i % 5 == 0) {
				continue;
			} else {
				sum+=i;
			}
		} {
			if(i % 3 == 0) {
				continue;
			} else if (i % 5 == 0) {
				continue;
			} else {
				sum+=i;
			}
		} if(i % 3 == 0) {
				continue;
			} else if (i % 5 == 0) {
				continue;
			} else {
				sum+=i;
			} i % 3 == 0 i % 3 i 3 0 {
				continue;
			} continue; if (i % 5 == 0) {
				continue;
			} else {
				sum+=i;
			} i % 5 == 0 i % 5 i 5 0 {
				continue;
			} continue; {
				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 sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		
		long sum = 0;
		
		for(int i = 1; i <= n; i++) {
			if(i % 3 == 0) {
				continue;
			} else if (i % 5 == 0) {
				continue;
			} else {
				sum+=i;
			}
		}

		
		System.out.println(sum);
	}
} public class Main {

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

		
		System.out.println(sum);
	}
} Main
import java.util.Scanner;

public class Main {

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

		
		System.out.println(sum);
	}
}
