import java.io.*;
import java.lang.*;
import java.util.*;
public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int N=Integer.parseInt(br.readLine());
        long sum=0;
        for(int i=1;i<=N;i++)
            if(i%3==0 || i%5==0) continue;
            else sum+=i;
        System.out.println(sum);
    }
} import java.io.*; io.* java import java.lang.*; lang.* java import java.util.*; util.* java public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int N=Integer.parseInt(br.readLine());
        long sum=0;
        for(int i=1;i<=N;i++)
            if(i%3==0 || i%5==0) continue;
            else sum+=i;
        System.out.println(sum);
    }
} Main public static void main(String[] args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int N=Integer.parseInt(br.readLine());
        long sum=0;
        for(int i=1;i<=N;i++)
            if(i%3==0 || i%5==0) continue;
            else sum+=i;
        System.out.println(sum);
    } main {
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int N=Integer.parseInt(br.readLine());
        long sum=0;
        for(int i=1;i<=N;i++)
            if(i%3==0 || i%5==0) continue;
            else sum+=i;
        System.out.println(sum);
    } BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int N=Integer.parseInt(br.readLine()); N Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br long sum=0; sum 0 for(int i=1;i<=N;i++)
            if(i%3==0 || i%5==0) continue;
            else sum+=i; int i=1; int i=1; i 1 i<=N i N i++ i++ i if(i%3==0 || i%5==0) continue;
            else sum+=i; if(i%3==0 || i%5==0) continue;
            else sum+=i; i%3==0 || i%5==0 i%3==0 i%3 i 3 0 i%5==0 i%5 i 5 0 continue; 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 IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int N=Integer.parseInt(br.readLine());
        long sum=0;
        for(int i=1;i<=N;i++)
            if(i%3==0 || i%5==0) continue;
            else sum+=i;
        System.out.println(sum);
    }
} public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int N=Integer.parseInt(br.readLine());
        long sum=0;
        for(int i=1;i<=N;i++)
            if(i%3==0 || i%5==0) continue;
            else sum+=i;
        System.out.println(sum);
    }
} Main
import java.io.*;
import java.lang.*;
import java.util.*;
public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int N=Integer.parseInt(br.readLine());
        long sum=0;
        for(int i=1;i<=N;i++)
            if(i%3==0 || i%5==0) continue;
            else sum+=i;
        System.out.println(sum);
    }
}
