import java.util.Scanner;

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

		long sum = 0;
		for(int i=1; i<=N; i++){
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		}
		
		System.out.printf("%d\n", sum);
	}
} import java.util.Scanner; Scanner java.util public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();

		long sum = 0;
		for(int i=1; i<=N; i++){
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		}
		
		System.out.printf("%d\n", sum);
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();

		long sum = 0;
		for(int i=1; i<=N; i++){
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		}
		
		System.out.printf("%d\n", sum);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();

		long sum = 0;
		for(int i=1; i<=N; i++){
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		}
		
		System.out.printf("%d\n", sum);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc sc.close() sc.close sc long sum = 0; sum 0 for(int i=1; i<=N; i++){
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		} int i=1; int i=1; i 1 i<=N i N i++ i++ i {
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		} {
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		} boolean bFizz = false; bFizz false if(i%3==0){
				bFizz = true;
				continue;
			} i%3==0 i%3 i 3 0 {
				bFizz = true;
				continue;
			} bFizz = true bFizz true continue; boolean bBuzz = false; bBuzz false if(i%5==0){
				bBuzz = true;
				continue;
			} i%5==0 i%5 i 5 0 {
				bBuzz = true;
				continue;
			} bBuzz = true bBuzz true continue; sum += i sum i System.out.printf("%d\n", sum) System.out.printf System.out System System.out "%d\n" sum String[] args args public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();

		long sum = 0;
		for(int i=1; i<=N; i++){
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		}
		
		System.out.printf("%d\n", sum);
	}
} public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();

		long sum = 0;
		for(int i=1; i<=N; i++){
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		}
		
		System.out.printf("%d\n", sum);
	}
} Main
import java.util.Scanner;

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

		long sum = 0;
		for(int i=1; i<=N; i++){
			boolean bFizz = false;
			if(i%3==0){
				bFizz = true;
				continue;
			}
			boolean bBuzz = false;
			if(i%5==0){
				bBuzz = true;
				continue;
			}
			sum += i;
		}
		
		System.out.printf("%d\n", sum);
	}
}