import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		long N = input.nextLong();
		long sum=0;
		
		for(long i=0;i<=N;i++) {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		}
		System.out.println(sum);
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		long N = input.nextLong();
		long sum=0;
		
		for(long i=0;i<=N;i++) {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		}
		System.out.println(sum);
	}
} Main public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		long N = input.nextLong();
		long sum=0;
		
		for(long i=0;i<=N;i++) {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		}
		System.out.println(sum);
	} main {
		Scanner input = new Scanner(System.in);
		long N = input.nextLong();
		long sum=0;
		
		for(long i=0;i<=N;i++) {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		}
		System.out.println(sum);
	} Scanner input = new Scanner(System.in); input new Scanner(System.in) long N = input.nextLong(); N input.nextLong() input.nextLong input long sum=0; sum 0 for(long i=0;i<=N;i++) {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		} long i=0; long i=0; i 0 i<=N i N i++ i++ i {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		} {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		} if(i%5!=0 && i%3!=0) {
				sum+=i;
			} i%5!=0 && i%3!=0 i%5!=0 i%5 i 5 0 i%3!=0 i%3 i 3 0 {
				sum+=i;
			} 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) {
		Scanner input = new Scanner(System.in);
		long N = input.nextLong();
		long sum=0;
		
		for(long i=0;i<=N;i++) {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		}
		System.out.println(sum);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		long N = input.nextLong();
		long sum=0;
		
		for(long i=0;i<=N;i++) {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		}
		System.out.println(sum);
	}
} Main
import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		long N = input.nextLong();
		long sum=0;
		
		for(long i=0;i<=N;i++) {
			if(i%5!=0 && i%3!=0) {
				sum+=i;
			}
		}
		System.out.println(sum);
	}
}
