*******************************
*** The hack uses generator ***
*******************************

** Command line arguments **
no arguments

** Generated test **


** Generator source **
#include <bits/stdc++.h>
using namespace std;

#define int long long int
#define fast ios::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define all(x) (x).begin(),(x).end()

void solve()
{
    srand(time(0));
    int n = 1e4-1000;
    cout << n << "\n";
    for(int i=1; i<=200; ++i)
    {
        cout << 1 << " " << i << "\n";
    }
    n -= 200;

    for(int i=1; i<=200; ++i)
    {
        cout << i << " " << 1 << "\n";
    }
    n -= 200;
    for(int i=1; i<=200; ++i)
    {
        cout << (int)(1e9) << " " << (int)(1e18)-i << "\n";
    }
    n-=200;
    int m = 1e9;
    while(n--)
    {
        cout << rand()%m << " " << rand()%m << "\n";
    }
}


signed main()
{
    int t=1;
    //cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}