import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
  public static void main(String[] args) throws IOException {
  	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int n = Integer.parseInt(br.readLine());
    
    long sum = 0L;
    for (int i = 1; i <= n; i++) {
      if (i % 3 != 0 && i % 5 != 0) {
      	sum += i;
      }
    }
    
    System.out.print(sum);
  }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
  public static void main(String[] args) throws IOException {
  	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int n = Integer.parseInt(br.readLine());
    
    long sum = 0L;
    for (int i = 1; i <= n; i++) {
      if (i % 3 != 0 && i % 5 != 0) {
      	sum += i;
      }
    }
    
    System.out.print(sum);
  }
} Main public static void main(String[] args) throws IOException {
  	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int n = Integer.parseInt(br.readLine());
    
    long sum = 0L;
    for (int i = 1; i <= n; i++) {
      if (i % 3 != 0 && i % 5 != 0) {
      	sum += i;
      }
    }
    
    System.out.print(sum);
  } main {
  	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int n = Integer.parseInt(br.readLine());
    
    long sum = 0L;
    for (int i = 1; i <= n; i++) {
      if (i % 3 != 0 && i % 5 != 0) {
      	sum += i;
      }
    }
    
    System.out.print(sum);
  } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int n = Integer.parseInt(br.readLine()); n Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br long sum = 0L; sum 0L 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.print(sum) System.out.print System.out System System.out sum String[] args args public class Main {
  public static void main(String[] args) throws IOException {
  	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int n = Integer.parseInt(br.readLine());
    
    long sum = 0L;
    for (int i = 1; i <= n; i++) {
      if (i % 3 != 0 && i % 5 != 0) {
      	sum += i;
      }
    }
    
    System.out.print(sum);
  }
} public class Main {
  public static void main(String[] args) throws IOException {
  	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int n = Integer.parseInt(br.readLine());
    
    long sum = 0L;
    for (int i = 1; i <= n; i++) {
      if (i % 3 != 0 && i % 5 != 0) {
      	sum += i;
      }
    }
    
    System.out.print(sum);
  }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
  public static void main(String[] args) throws IOException {
  	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int n = Integer.parseInt(br.readLine());
    
    long sum = 0L;
    for (int i = 1; i <= n; i++) {
      if (i % 3 != 0 && i % 5 != 0) {
      	sum += i;
      }
    }
    
    System.out.print(sum);
  }
}