import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
      Scanner input = new Scanner(System.in);
      long sum = 0;
      int num = Integer.parseInt(input.nextLine());    	

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

      for (int i = 1; i <= num; i++) {
          if (i % 3 != 0 && i % 5 != 0) {
          	sum += i;
          }
      }
      
      System.out.println(sum);
    }
} Main public static void main(String[] args) {
      Scanner input = new Scanner(System.in);
      long sum = 0;
      int num = Integer.parseInt(input.nextLine());    	

      for (int i = 1; i <= num; i++) {
          if (i % 3 != 0 && i % 5 != 0) {
          	sum += i;
          }
      }
      
      System.out.println(sum);
    } main {
      Scanner input = new Scanner(System.in);
      long sum = 0;
      int num = Integer.parseInt(input.nextLine());    	

      for (int i = 1; i <= num; i++) {
          if (i % 3 != 0 && i % 5 != 0) {
          	sum += i;
          }
      }
      
      System.out.println(sum);
    } Scanner input = new Scanner(System.in); input new Scanner(System.in) long sum = 0; sum 0 int num = Integer.parseInt(input.nextLine()); num Integer.parseInt(input.nextLine()) Integer.parseInt Integer input.nextLine() input.nextLine input for (int i = 1; i <= num; i++) {
          if (i % 3 != 0 && i % 5 != 0) {
          	sum += i;
          }
      } int i = 1; int i = 1; i 1 i <= num i num i++ i++ i {
          if (i % 3 != 0 && i % 5 != 0) {
          	sum += i;
          }
      } {
          if (i % 3 != 0 && i % 5 != 0) {
          	sum += i;
          }
      } if (i % 3 != 0 && i % 5 != 0) {
          	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 += 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 input = new Scanner(System.in);
      long sum = 0;
      int num = Integer.parseInt(input.nextLine());    	

      for (int i = 1; i <= num; i++) {
          if (i % 3 != 0 && i % 5 != 0) {
          	sum += i;
          }
      }
      
      System.out.println(sum);
    }
} public class Main {
	public static void main(String[] args) {
      Scanner input = new Scanner(System.in);
      long sum = 0;
      int num = Integer.parseInt(input.nextLine());    	

      for (int i = 1; i <= num; i++) {
          if (i % 3 != 0 && i % 5 != 0) {
          	sum += i;
          }
      }
      
      System.out.println(sum);
    }
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
      Scanner input = new Scanner(System.in);
      long sum = 0;
      int num = Integer.parseInt(input.nextLine());    	

      for (int i = 1; i <= num; i++) {
          if (i % 3 != 0 && i % 5 != 0) {
          	sum += i;
          }
      }
      
      System.out.println(sum);
    }
}