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

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = reader.readLine();
        int n = Integer.parseInt(str);

        long sum = 0;
        for (int i = 1; i <= n; i++) {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            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 reader = new BufferedReader(new InputStreamReader(System.in));
        String str = reader.readLine();
        int n = Integer.parseInt(str);

        long sum = 0;
        for (int i = 1; i <= n; i++) {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            sum += i;
        }

        System.out.print(sum);
    }
} Main public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = reader.readLine();
        int n = Integer.parseInt(str);

        long sum = 0;
        for (int i = 1; i <= n; i++) {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            sum += i;
        }

        System.out.print(sum);
    } main {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = reader.readLine();
        int n = Integer.parseInt(str);

        long sum = 0;
        for (int i = 1; i <= n; i++) {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            sum += i;
        }

        System.out.print(sum);
    } BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); reader new BufferedReader(new InputStreamReader(System.in)) String str = reader.readLine(); str reader.readLine() reader.readLine reader int n = Integer.parseInt(str); n Integer.parseInt(str) Integer.parseInt Integer str long sum = 0; sum 0 for (int i = 1; i <= n; i++) {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            sum += i;
        } int i = 1; int i = 1; i 1 i <= n i n i++ i++ i {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            sum += i;
        } {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            sum += i;
        } if (i % 3 == 0 || i % 5 == 0)
                continue; i % 3 == 0 || i % 5 == 0 i % 3 == 0 i % 3 i 3 0 i % 5 == 0 i % 5 i 5 0 continue; 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 reader = new BufferedReader(new InputStreamReader(System.in));
        String str = reader.readLine();
        int n = Integer.parseInt(str);

        long sum = 0;
        for (int i = 1; i <= n; i++) {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            sum += i;
        }

        System.out.print(sum);
    }
} public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = reader.readLine();
        int n = Integer.parseInt(str);

        long sum = 0;
        for (int i = 1; i <= n; i++) {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            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 reader = new BufferedReader(new InputStreamReader(System.in));
        String str = reader.readLine();
        int n = Integer.parseInt(str);

        long sum = 0;
        for (int i = 1; i <= n; i++) {
            if (i % 3 == 0 || i % 5 == 0)
                continue;
            sum += i;
        }

        System.out.print(sum);
    }
}
