import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            int N = sc.nextInt();

            int[] a = new int[N + 1];
            for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            }

            long sum = 0;
            for (int i = 1; i <= N; i++) {
                sum += a[i];
            }

            System.out.println(sum);
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            int N = sc.nextInt();

            int[] a = new int[N + 1];
            for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            }

            long sum = 0;
            for (int i = 1; i <= N; i++) {
                sum += a[i];
            }

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

            int[] a = new int[N + 1];
            for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            }

            long sum = 0;
            for (int i = 1; i <= N; i++) {
                sum += a[i];
            }

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

            int[] a = new int[N + 1];
            for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            }

            long sum = 0;
            for (int i = 1; i <= N; i++) {
                sum += a[i];
            }

            System.out.println(sum);
        }
    } try (Scanner sc = new Scanner(System.in)) {
            int N = sc.nextInt();

            int[] a = new int[N + 1];
            for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            }

            long sum = 0;
            for (int i = 1; i <= N; i++) {
                sum += a[i];
            }

            System.out.println(sum);
        } {
            int N = sc.nextInt();

            int[] a = new int[N + 1];
            for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            }

            long sum = 0;
            for (int i = 1; i <= N; i++) {
                sum += a[i];
            }

            System.out.println(sum);
        } Scanner sc = new Scanner(System.in) Scanner sc = new Scanner(System.in) new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int[] a = new int[N + 1]; a new int[N + 1] N + 1 N 1 for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            } int i = 1; int i = 1; i 1 i <= N i N i++ i++ i {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            } {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = 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;
                } continue; a[i] = i a[i] a i i long sum = 0; sum 0 for (int i = 1; i <= N; i++) {
                sum += a[i];
            } int i = 1; int i = 1; i 1 i <= N i N i++ i++ i {
                sum += a[i];
            } {
                sum += a[i];
            } sum += a[i] sum a[i] a 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) {
        try (Scanner sc = new Scanner(System.in)) {
            int N = sc.nextInt();

            int[] a = new int[N + 1];
            for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            }

            long sum = 0;
            for (int i = 1; i <= N; i++) {
                sum += a[i];
            }

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

            int[] a = new int[N + 1];
            for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            }

            long sum = 0;
            for (int i = 1; i <= N; i++) {
                sum += a[i];
            }

            System.out.println(sum);
        }
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            int N = sc.nextInt();

            int[] a = new int[N + 1];
            for (int i = 1; i <= N; i++) {
                if (i % 3 == 0 || i % 5 == 0) {
                    continue;
                }
                a[i] = i;
            }

            long sum = 0;
            for (int i = 1; i <= N; i++) {
                sum += a[i];
            }

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