#include <bits/stdc++.h>

using namespace std;

using LL = long long;



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

    int n;
    cin >> n;
    // int t = n / 6;
    vector<pair<int, int>> book, drawer;
    for (int i = 0; i < n; i += 6)
    {
        for (int j = 0; j < 6; ++j)
        {
            book.push_back({1000 - i - j, i + j + 1});
        }
        drawer.push_back({1000 - i, i + 2});
        drawer.push_back({1000 - i, i + 3});
        drawer.push_back({1000 - i - 2, i + 4});
        drawer.push_back({1000 - i - 3, i + 5});
        drawer.push_back({1000 - i - 4, i + 6});
        drawer.push_back({1000 - i - 4, i + 6});
    }
    for (int i = 0; i < n % 6; ++i)
    {
        book.push_back({500, 500});
        drawer.push_back({500, 500});
    }
    for (auto [x, y] : book)
    {
        cout << x << ' ' << y << '\n';
    }
    cout << '\n';
    for (auto [x, y] : drawer)
    {
        cout << x << ' ' << y << '\n';
    }
}