using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass {
public static void Main() {
long count = Enumerable.Range(0, int.MaxValue).
Concat(Enumerable.Range(0, int.MaxValue)).LongCount(n => n > 1 && n < 4);
Console.WriteLine(count);
}
}