import java.util.Scanner;
 
public class Main { //クラス名はMain
    public static void main(String[] args) {
      Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      long sum = 0;
       for(int i = 1; i <= N; ++i){
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       }
      System.out.println(sum);
    }
} import java.util.Scanner; Scanner java.util public class Main { //クラス名はMain
    public static void main(String[] args) {
      Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      long sum = 0;
       for(int i = 1; i <= N; ++i){
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       }
      System.out.println(sum);
    }
} Main public static void main(String[] args) {
      Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      long sum = 0;
       for(int i = 1; i <= N; ++i){
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       }
      System.out.println(sum);
    } main {
      Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      long sum = 0;
       for(int i = 1; i <= N; ++i){
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       }
      System.out.println(sum);
    } Scanner in = new Scanner(System.in); in new Scanner(System.in) int N = in.nextInt(); N in.nextInt() in.nextInt in long sum = 0; sum 0 for(int i = 1; i <= N; ++i){
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       } int i = 1; int i = 1; i 1 i <= N i N ++i ++i i {
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       } {
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       } if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           } !(i % 3 == 0) && !(i % 5 == 0) !(i % 3 == 0) (i % 3 == 0) i % 3 i 3 0 !(i % 5 == 0) (i % 5 == 0) i % 5 i 5 0 {
           sum = sum + i;
           } sum = sum + i sum sum + i sum i System.out.println(sum) System.out.println System.out System System.out sum String[] args args public class Main { //クラス名はMain
    public static void main(String[] args) {
      Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      long sum = 0;
       for(int i = 1; i <= N; ++i){
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       }
      System.out.println(sum);
    }
} public class Main { //クラス名はMain
    public static void main(String[] args) {
      Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      long sum = 0;
       for(int i = 1; i <= N; ++i){
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       }
      System.out.println(sum);
    }
} Main
import java.util.Scanner;
 
public class Main { //クラス名はMain
    public static void main(String[] args) {
      Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      long sum = 0;
       for(int i = 1; i <= N; ++i){
           if (!(i % 3 == 0) && !(i % 5 == 0)){
           sum = sum + i;
           }
       }
      System.out.println(sum);
    }
}