import java.util.Scanner;

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

		// 入力値の取得
		long N = sc.nextLong();
		
		long sum = 0;
		for (int i = 1; i <= N; i++) {
			if (i % 3 == 0) {
				continue;
			}
			if (i % 5 == 0) {
				continue;
			}
			sum += i;
		}
		
		// 結果の出力
		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);

		// 入力値の取得
		long N = sc.nextLong();
		
		long sum = 0;
		for (int i = 1; i <= N; i++) {
			if (i % 3 == 0) {
				continue;
			}
			if (i % 5 == 0) {
				continue;
			}
			sum += i;
		}
		
		// 結果の出力
		System.out.println(sum);

		sc.close();
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		// 入力値の取得
		long N = sc.nextLong();
		
		long sum = 0;
		for (int i = 1; i <= N; i++) {
			if (i % 3 == 0) {
				continue;
			}
			if (i % 5 == 0) {
				continue;
			}
			sum += i;
		}
		
		// 結果の出力
		System.out.println(sum);

		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);

		// 入力値の取得
		long N = sc.nextLong();
		
		long sum = 0;
		for (int i = 1; i <= N; i++) {
			if (i % 3 == 0) {
				continue;
			}
			if (i % 5 == 0) {
				continue;
			}
			sum += i;
		}
		
		// 結果の出力
		System.out.println(sum);

		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long N = sc.nextLong(); N sc.nextLong() sc.nextLong sc long sum = 0; sum 0 for (int i = 1; i <= N; i++) {
			if (i % 3 == 0) {
				continue;
			}
			if (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) {
				continue;
			}
			if (i % 5 == 0) {
				continue;
			}
			sum += i;
		} {
			if (i % 3 == 0) {
				continue;
			}
			if (i % 5 == 0) {
				continue;
			}
			sum += i;
		} if (i % 3 == 0) {
				continue;
			} i % 3 == 0 i % 3 i 3 0 {
				continue;
			} continue; if (i % 5 == 0) {
				continue;
			} i % 5 == 0 i % 5 i 5 0 {
				continue;
			} continue; 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);

		// 入力値の取得
		long N = sc.nextLong();
		
		long sum = 0;
		for (int i = 1; i <= N; i++) {
			if (i % 3 == 0) {
				continue;
			}
			if (i % 5 == 0) {
				continue;
			}
			sum += i;
		}
		
		// 結果の出力
		System.out.println(sum);

		sc.close();
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		// 入力値の取得
		long N = sc.nextLong();
		
		long sum = 0;
		for (int i = 1; i <= N; i++) {
			if (i % 3 == 0) {
				continue;
			}
			if (i % 5 == 0) {
				continue;
			}
			sum += i;
		}
		
		// 結果の出力
		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);

		// 入力値の取得
		long N = sc.nextLong();
		
		long sum = 0;
		for (int i = 1; i <= N; i++) {
			if (i % 3 == 0) {
				continue;
			}
			if (i % 5 == 0) {
				continue;
			}
			sum += i;
		}
		
		// 結果の出力
		System.out.println(sum);

		sc.close();
	}
}
