import java.util.*;
public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
    double sum = 0;
    for(int i = 1; i <= n; i++){
      if(i % 3 != 0 && i % 5 != 0){
        sum += i;
      }
    }
    
    System.out.println(String.format("%.0f", sum));
  }
} import java.util.*; util.* java public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
    double sum = 0;
    for(int i = 1; i <= n; i++){
      if(i % 3 != 0 && i % 5 != 0){
        sum += i;
      }
    }
    
    System.out.println(String.format("%.0f", sum));
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
    double sum = 0;
    for(int i = 1; i <= n; i++){
      if(i % 3 != 0 && i % 5 != 0){
        sum += i;
      }
    }
    
    System.out.println(String.format("%.0f", sum));
  } main {
    Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
    double sum = 0;
    for(int i = 1; i <= n; i++){
      if(i % 3 != 0 && i % 5 != 0){
        sum += i;
      }
    }
    
    System.out.println(String.format("%.0f", sum));
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc double sum = 0; sum 0 for(int i = 1; i <= n; i++){
      if(i % 3 != 0 && i % 5 != 0){
        sum += i;
      }
    } int i = 1; int i = 1; i 1 i <= n i n 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(String.format("%.0f", sum)) System.out.println System.out System System.out String.format("%.0f", sum) String.format String "%.0f" sum String[] args args public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
    double sum = 0;
    for(int i = 1; i <= n; i++){
      if(i % 3 != 0 && i % 5 != 0){
        sum += i;
      }
    }
    
    System.out.println(String.format("%.0f", sum));
  }
} public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
    double sum = 0;
    for(int i = 1; i <= n; i++){
      if(i % 3 != 0 && i % 5 != 0){
        sum += i;
      }
    }
    
    System.out.println(String.format("%.0f", sum));
  }
} Main
import java.util.*;
public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
    double sum = 0;
    for(int i = 1; i <= n; i++){
      if(i % 3 != 0 && i % 5 != 0){
        sum += i;
      }
    }
    
    System.out.println(String.format("%.0f", sum));
  }
}