#include <bits/stdc++.h>
#define ll long long
#define pb push_back

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);

	int n;
	cin >> n;

	vector<int> nx = {0, -1, -1, -1}, ny = {0, -1, 2, 2};

	//Notebook
	int nowx = 500, nowy = 500;
	for(int i=0; i<150; i++)
    {
        cout << nowx << " " << nowy << "\n";
        nowx += nx[i%4];
        nowy += ny[i%4];
    }
    for(int i=150; i<n; i++)
    {
        cout << "1 1000\n";
    }

    cout << "\n";
    //Drawer
    nx = {-1, 0, -1, -1}, ny = {0, 0, 1, 2};
    nowx = 500, nowy = 500;
	for(int i=0; i<150; i++)
    {
        cout << nowx << " " << nowy << "\n";
        if(i==0) continue;
        nowx += nx[i%4];
        nowy += ny[i%4];
    }
    for(int i=150; i<n; i++)
    {
        cout << "1 1000\n";
    }
}