import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long num = sc.nextLong();

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

        System.out.println(sum);
    }
} import java.io.File; File java.io import java.io.FileInputStream; FileInputStream java.io import java.io.FileNotFoundException; FileNotFoundException java.io import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long num = sc.nextLong();

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

        System.out.println(sum);
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long num = sc.nextLong();

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

        System.out.println(sum);
    } main {
        Scanner sc = new Scanner(System.in);
        long num = sc.nextLong();

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

        System.out.println(sum);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long num = sc.nextLong(); num sc.nextLong() sc.nextLong sc long sum = 0; sum 0 for (int i=1; i<=num; i++) {
            if (i % 5 == 0 || i % 3 == 0) continue;
            else sum+=i;
        } int i=1; int i=1; i 1 i<=num i num i++ i++ i {
            if (i % 5 == 0 || i % 3 == 0) continue;
            else sum+=i;
        } {
            if (i % 5 == 0 || i % 3 == 0) continue;
            else sum+=i;
        } if (i % 5 == 0 || i % 3 == 0) continue;
            else sum+=i; i % 5 == 0 || i % 3 == 0 i % 5 == 0 i % 5 i 5 0 i % 3 == 0 i % 3 i 3 0 continue; sum+=i sum i System.out.println(sum) System.out.println System.out System System.out sum String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long num = sc.nextLong();

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

        System.out.println(sum);
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long num = sc.nextLong();

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

        System.out.println(sum);
    }
} Main
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long num = sc.nextLong();

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

        System.out.println(sum);
    }
}
