#include <bits/stdc++.h>
using namespace std;
typedef long long ll;


int main() {
    // cin.tie(0)->sync_with_stdio(0);

    int n; cin >> n;
    int m = n / 8;

    int prints1 = 0;
    for (int i = 0; i < m; i++) {
        int left = 4 * i + 1;
        int right = 1000 - 3 * i;
        for (int j = 0; j < 3; j++) {
            cout << left << " " << right << "\n";
        }
        cout << left + 1 << " " << right - 1 << "\n";
        cout << left + 2 << " " << right - 2 << "\n";
        for (int j = 0; j < 3; j++) {
            cout << left + 3 << " " << right - 2 << "\n";
        }
        prints1 += 8;
    }

    for (int i = 0; i < n % 8; i++) {
        cout << 300 + i << " " << 700 + i << "\n";
        prints1++;
    }

    assert(prints1 == n);

    cout << "\n";

    int prints2 = 0;
    for (int i = 0; i < m; i++) {
        int left = 4 * i + 1;
        int right = 1000 - 3 * i;
        for (int j = 0; j < 3; j++) {
            cout << left << " " << right << "\n";
        }
        cout << left + 1 << " " << right << "\n";
        cout << left + 2 << " " << right - 1 << "\n";
        for (int j = 0; j < 3; j++) {
            cout << left + 3 << " " << right - 2 << "\n";
        }
        prints2 += 8;
    }

    for (int i = 0; i < n % 8; i++) {
        cout << 300 + i << " " << 700 + i << "\n";
        prints2++;
    }

    assert(prints2 == n);
}