import java.util.stream.IntStream;

class Main {
  public static void main(String[] args) {
      
    IntStream stream = IntStream.range(1, 1000);
    long result = stream.reduce(0, (sum, value) -> (value % 3 == 0 || value % 5 == 0) ? sum+value : sum);
    
    System.out.println(result);
  }
}