import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long N = sc.nextLong();
    long ans = 0;
    //int[] a = new int[N];
    for(int i=1; i<=N; i++){
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(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);
    long N = sc.nextLong();
    long ans = 0;
    //int[] a = new int[N];
    for(int i=1; i<=N; i++){
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(i);
      //}
    }
    System.out.println(ans);
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long N = sc.nextLong();
    long ans = 0;
    //int[] a = new int[N];
    for(int i=1; i<=N; i++){
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(i);
      //}
    }
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    long N = sc.nextLong();
    long ans = 0;
    //int[] a = new int[N];
    for(int i=1; i<=N; i++){
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(i);
      //}
    }
    System.out.println(ans);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long N = sc.nextLong(); N sc.nextLong() sc.nextLong sc long ans = 0; ans 0 for(int i=1; i<=N; i++){
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(i);
      //}
    } int i=1; int i=1; i 1 i<=N i N i++ i++ i {
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(i);
      //}
    } {
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(i);
      //}
    } if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      } i%3==0 || i%5==0 i%3==0 i%3 i 3 0 i%5==0 i%5 i 5 0 {
        continue;
      } continue; {
        ans+=i;
      } 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);
    long N = sc.nextLong();
    long ans = 0;
    //int[] a = new int[N];
    for(int i=1; i<=N; i++){
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(i);
      //}
    }
    System.out.println(ans);
  }
} public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long N = sc.nextLong();
    long ans = 0;
    //int[] a = new int[N];
    for(int i=1; i<=N; i++){
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(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);
    long N = sc.nextLong();
    long ans = 0;
    //int[] a = new int[N];
    for(int i=1; i<=N; i++){
      //if(i%3!=0 && i%5!=0){
      if(i%3==0 || i%5==0){
        continue;
      } else {
        ans+=i;
      }
      //a[i] = sc.nextInt();
      //if(i%3==0 && i%5==0){
        //a[i]="FizzBuzz";
      //} else if(i%3==0) {
        //a[i]="Fizz";
      //} else if(i%5==0) {
        //a[i]="Buzz";
      //} else {
        //a[i]=String.valueOf(i);
      //}
    }
    System.out.println(ans);
  }
}