import java.util.*;
public class Main{
	public static void main(String args[]){
		
		Scanner ob = new Scanner(System.in);
		long N = ob.nextLong();
		long sum = 0;
		
		for(long i = 1; i <= N; i++){
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		}
		System.out.println(sum);
	}
} import java.util.*; util.* java public class Main{
	public static void main(String args[]){
		
		Scanner ob = new Scanner(System.in);
		long N = ob.nextLong();
		long sum = 0;
		
		for(long i = 1; i <= N; i++){
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		}
		System.out.println(sum);
	}
} Main public static void main(String args[]){
		
		Scanner ob = new Scanner(System.in);
		long N = ob.nextLong();
		long sum = 0;
		
		for(long i = 1; i <= N; i++){
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		}
		System.out.println(sum);
	} main {
		
		Scanner ob = new Scanner(System.in);
		long N = ob.nextLong();
		long sum = 0;
		
		for(long i = 1; i <= N; i++){
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		}
		System.out.println(sum);
	} Scanner ob = new Scanner(System.in); ob new Scanner(System.in) long N = ob.nextLong(); N ob.nextLong() ob.nextLong ob long sum = 0; sum 0 for(long i = 1; i <= N; i++){
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		} long i = 1; long i = 1; i 1 i <= N i N i++ i++ i {
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		} {
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		} if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			} (i % 3 != 0) && (i % 5 != 0) (i % 3 != 0) i % 3 i 3 0 (i % 5 != 0) i % 5 i 5 0 {
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			} sum += i sum i {
				continue;
			} continue; 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[]){
		
		Scanner ob = new Scanner(System.in);
		long N = ob.nextLong();
		long sum = 0;
		
		for(long i = 1; i <= N; i++){
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		}
		System.out.println(sum);
	}
} public class Main{
	public static void main(String args[]){
		
		Scanner ob = new Scanner(System.in);
		long N = ob.nextLong();
		long sum = 0;
		
		for(long i = 1; i <= N; i++){
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		}
		System.out.println(sum);
	}
} Main
import java.util.*;
public class Main{
	public static void main(String args[]){
		
		Scanner ob = new Scanner(System.in);
		long N = ob.nextLong();
		long sum = 0;
		
		for(long i = 1; i <= N; i++){
			if((i % 3 != 0) && (i % 5 != 0)){
				sum += i;
				//System.out.println("i: " + i);
				//System.out.println("Sum: " + sum);	
			}
			else{
				continue;
			}
		}
		System.out.println(sum);
	}
}
