import java.util.Scanner;

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

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