using System.Text;
using static System.Math;
using System.Collections.Generic;
using System.Linq;
using System;

public class P
{
    public int x { get; set; }
    public int y { get; set; }
}

public class Hello
{
    static void Main()
    {
        var n = 1000000 / 4;
        getAns(n);
    }
    static void getAns(int n)
    {
        Console.WriteLine(n*4);
        var p1 = new List<P >();
        for (int i = n ; i >= 1; i--)
        {
            p1.Add(new P { x = i, y = n - i });
            p1.Add(new P { x = i - n, y = i });
        }
         p1 =  p1.OrderByDescending(z => z.x).ToList();
        var p2 = new List<P>();
        for (int i = 0; i < 2 * n; i++)
        {
            p2.Add(new P { x = -p1[i].x, y = -p1[i].y });
        }
        var sb = new StringBuilder();
        foreach (var x in p1) sb.Append(string.Format("{0} {1}\n", x.x, x.y));
        foreach (var x in p1) sb.Append(string.Format("{0} {1}\n", x.x, x.y));
        Console.Write(sb);
    }
}