import java.io.*;
import java.util.*;

public class Main {
	public static void main(String[] args) throws IOException{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(in.readLine());
		long sum = 0;
		for (int i = 1; i <= n; i++) {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		}
		
		System.out.println(sum);
	}
} import java.io.*; io.* java import java.util.*; util.* java public class Main {
	public static void main(String[] args) throws IOException{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(in.readLine());
		long sum = 0;
		for (int i = 1; i <= n; i++) {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		}
		
		System.out.println(sum);
	}
} Main public static void main(String[] args) throws IOException{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(in.readLine());
		long sum = 0;
		for (int i = 1; i <= n; i++) {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		}
		
		System.out.println(sum);
	} main {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(in.readLine());
		long sum = 0;
		for (int i = 1; i <= n; i++) {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		}
		
		System.out.println(sum);
	} BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); in new BufferedReader(new InputStreamReader(System.in)) int n = Integer.parseInt(in.readLine()); n Integer.parseInt(in.readLine()) Integer.parseInt Integer in.readLine() in.readLine in long sum = 0; sum 0 for (int i = 1; i <= n; i++) {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		} int i = 1; int i = 1; i 1 i <= n i n i++ i++ i {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		} {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		} if (i % 3 != 0 && i % 5 != 0)
				sum  += i; i % 3 != 0 && i % 5 != 0 i % 3 != 0 i % 3 i 3 0 i % 5 != 0 i % 5 i 5 0 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 IOException{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(in.readLine());
		long sum = 0;
		for (int i = 1; i <= n; i++) {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		}
		
		System.out.println(sum);
	}
} public class Main {
	public static void main(String[] args) throws IOException{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(in.readLine());
		long sum = 0;
		for (int i = 1; i <= n; i++) {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		}
		
		System.out.println(sum);
	}
} Main
import java.io.*;
import java.util.*;

public class Main {
	public static void main(String[] args) throws IOException{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(in.readLine());
		long sum = 0;
		for (int i = 1; i <= n; i++) {
			if (i % 3 != 0 && i % 5 != 0)
				sum  += i;
		}
		
		System.out.println(sum);
	}
}
