#include <bits/stdc++.h>
using namespace std;
vector<pair<int, int>> pos, ans;
int n;
pair<int, int> getans(int x, int y)
{
    y--;
    return { pos[y].second, pos[x].first };
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n;

    for (int i = 0; i < n; ++i) {
        pos.push_back({ i+1,500-i });
    }
    for (int i = 0; i <= 15; ++i) {
        ans.push_back(getans(8 * i, 8 * i + 4));
        ans.push_back(getans(8 * i, 8 * i + 4));
        ans.push_back(getans(8 * i, 8 * i + 4));
        ans.push_back(getans(8 * i + 3, 8 * i + 5));
        ans.push_back(getans(8 * i + 4, 8 * i + 8));
        ans.push_back(getans(8 * i + 4, 8 * i + 8));
        ans.push_back(getans(8 * i + 4, 8 * i + 8));
        ans.push_back(getans(8 * i + 4, 8 * i + 8));
    }
    for (int i = 144; i < n; ++i) {
        ans.push_back(getans(i, i + 1));
    }
    for (auto [x, y] : pos)
        cout << x << " " << y << endl;
    cout << endl;
    for (auto [x, y] : ans)
        cout << x << " " << y << endl;
    return 0;
}