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

public class Main {

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

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

} public class Main {

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

}