#include <cstdio>
#include <algorithm>
#include <utility>
#include <vector>
using namespace std;
typedef pair<int, int> pii;
constexpr int MAXN = 100'005;

int main()
{
	int n;
	scanf("%d", &n);
	vector<pii> bo, dr;

	constexpr int S = 1001;
	int w = 1;
	for (int i = 0; i < n / 3; i++)
	{
		bo.push_back({w, S - w - 1});
		bo.push_back({w, S - w - 2});
		bo.push_back({w + 1, S - w - 2});
		dr.push_back({w, S - w});
		dr.push_back({w + 1, S - w - 1});
		dr.push_back({w + 2, S - w - 2});
		w += 3;
	}

	for (int i = 0; i < n % 3; i++)
	{
		bo.push_back({w, S - w});
		dr.push_back({w, S - w});
	}

	for (const pii &b : bo)
		printf("%d %d\n", b.first, b.second);
	printf("\n");
	for (const pii &d : dr)
		printf("%d %d\n", d.first, d.second);
	return 0;
}