import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long n,sum = 0;

        n = sc.nextLong();
        
        for(long i = 1; i <= n; i++){
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        }
        
        System.out.println(sum);
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long n,sum = 0;

        n = sc.nextLong();
        
        for(long i = 1; i <= n; i++){
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        }
        
        System.out.println(sum);
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long n,sum = 0;

        n = sc.nextLong();
        
        for(long i = 1; i <= n; i++){
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        }
        
        System.out.println(sum);
    } main {
        Scanner sc = new Scanner(System.in);
        long n,sum = 0;

        n = sc.nextLong();
        
        for(long i = 1; i <= n; i++){
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        }
        
        System.out.println(sum);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long n n sum = 0; sum 0 n = sc.nextLong() n sc.nextLong() sc.nextLong sc for(long i = 1; i <= n; i++){
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        } long i = 1; long i = 1; i 1 i <= n i n i++ i++ i {
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        } {
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        } if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            } (i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0) (i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0) (i % 3 != 0) i % 3 i 3 0 (i % 5 != 0) i % 5 i 5 0 (i % 15 != 0) i % 15 i 15 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) throws Exception {
        Scanner sc = new Scanner(System.in);
        long n,sum = 0;

        n = sc.nextLong();
        
        for(long i = 1; i <= n; i++){
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        }
        
        System.out.println(sum);
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long n,sum = 0;

        n = sc.nextLong();
        
        for(long i = 1; i <= n; i++){
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        }
        
        System.out.println(sum);
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long n,sum = 0;

        n = sc.nextLong();
        
        for(long i = 1; i <= n; i++){
            if((i % 3 != 0) && (i % 5 != 0) && (i % 15 != 0)){
                sum += i;
            }
        }
        
        System.out.println(sum);
    }
}
