import java.util.Scanner;
public class Main {
		public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		long a =0;
        for(int i=0; i<=N; i++){
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        }
          System.out.println(a);
	}
} 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();
		long a =0;
        for(int i=0; i<=N; i++){
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        }
          System.out.println(a);
	}
} Main public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		long a =0;
        for(int i=0; i<=N; i++){
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        }
          System.out.println(a);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		long a =0;
        for(int i=0; i<=N; i++){
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        }
          System.out.println(a);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc long a =0; a 0 for(int i=0; i<=N; i++){
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        } int i=0; int i=0; i 0 i<=N i N i++ i++ i {
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        } {
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        } if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           } i%3==0 && i%5==0 i%3==0 i%3 i 3 0 i%5==0 i%5 i 5 0 {
           } if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           } i%3==0 && i%5!=0 i%3==0 i%3 i 3 0 i%5!=0 i%5 i 5 0 {
           } if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           } i%3!=0 && i%5==0 i%3!=0 i%3 i 3 0 i%5==0 i%5 i 5 0 {
           } if(i%3!=0 || i%5!=0){
           a +=i;		 
           } i%3!=0 || i%5!=0 i%3!=0 i%3 i 3 0 i%5!=0 i%5 i 5 0 {
           a +=i;		 
           } a +=i a i System.out.println(a) System.out.println System.out System System.out a String args[] args public class Main {
		public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		long a =0;
        for(int i=0; i<=N; i++){
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        }
          System.out.println(a);
	}
} public class Main {
		public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		long a =0;
        for(int i=0; i<=N; i++){
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        }
          System.out.println(a);
	}
} Main
import java.util.Scanner;
public class Main {
		public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		long a =0;
        for(int i=0; i<=N; i++){
           if(i%3==0 && i%5==0){
           }else if(i%3==0 && i%5!=0){
           }else if(i%3!=0 && i%5==0){
           }else if(i%3!=0 || i%5!=0){
           a +=i;		 
           }
        }
          System.out.println(a);
	}
}