#include <bits/stdc++.h>

const int Min = 1, Maxn = 1000000, Maxm = 100;

using namespace std;

int main()
{
    srand(time(NULL));
    ///random test bài 1
    /*
    int m, n;
    ofstream inp("perfect.inp");
    //problems 1
    m = 100;
    inp << m << '\n';
    while (m--)
    {
        n = 1000000;

        inp << n << '\n';
    }
    */
    ///random test bài 2
    /*
    int n;
    ofstream inp("grab.inp");
    n = 100;
    inp << n << endl;
    int a[n+1][n+1];
    memset(a, 0, sizeof a);
    int time = rand() % (n*n - 1 + 1) + 1;
    while (time)
    {
        int x = rand() % (n-1+1)+1;
        int y = rand() % (n-1+1)+1;
        if (a[x][y]==1) continue;
        else{
            a[x][y]=1;
            inp << x << ' ' << y << endl;
            time--;
        }
    }
    */
}