import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        long sum = 0;

        for(int i=1;i<=N;i++){
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        }

        System.out.println(sum);
        sc.close();
    }

} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        long sum = 0;

        for(int i=1;i<=N;i++){
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        }

        System.out.println(sum);
        sc.close();
    }

} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        long sum = 0;

        for(int i=1;i<=N;i++){
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        }

        System.out.println(sum);
        sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        long sum = 0;

        for(int i=1;i<=N;i++){
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        }

        System.out.println(sum);
        sc.close();
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc long sum = 0; sum 0 for(int i=1;i<=N;i++){
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        } int i=1; int i=1; i 1 i<=N i N i++ i++ i {
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        } {
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        } if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            } i%3==0 i%3 i 3 0 {
                sum += 0;
            } sum += 0 sum 0 if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            } i%5==0 i%5 i 5 0 {
                sum += 0;
            } sum += 0 sum 0 {
                sum += i;
            } sum += i sum i System.out.println(sum) System.out.println System.out System System.out sum sc.close() sc.close sc String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        long sum = 0;

        for(int i=1;i<=N;i++){
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        }

        System.out.println(sum);
        sc.close();
    }

} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        long sum = 0;

        for(int i=1;i<=N;i++){
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        }

        System.out.println(sum);
        sc.close();
    }

} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        long sum = 0;

        for(int i=1;i<=N;i++){
            if(i%3==0) {
                sum += 0;
            } else if(i%5==0) {
                sum += 0;
            } else {
                sum += i;
            }
        }

        System.out.println(sum);
        sc.close();
    }

}
