#include "bits/stdc++.h"

using namespace std;

using ll = long long int;
using ld = long double;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pdd = pair<double, double>;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vvvl = vector<vvl>;
using vd = vector<double>;
using vvd = vector<vd>;
using vs = vector<string>;
using vb = vector<bool>;
using vvb = vector<vb>;

const int INF = (1 << 30) - 1;
const ll INF64 = ((ll)1 << 62) - 1;
const double PI = 3.1415926535897932384626433832795;

const int dx[] = { 0, 1, 0, -1 };
const int dy[] = { -1, 0, 1, 0 };

int gcd(int x, int y) { return y ? gcd(y, x % y) : x; }
ll gcd(ll x, ll y) { return y ? gcd(y, x % y) : x; }

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	int n;
	cin >> n;
	vvi res(n, vi(n));

	int x = 0, y = 0, d = 1;
	for (int i = 1; i <= n * n; i++) {
		res[y][x] = i;

		int nx = x + dx[d];
		int ny = y + dy[d];
		if (nx >= 0 && n > nx && ny >= 0 && n > ny && res[ny][nx] == 0) {
			x = nx;
			y = ny;
			continue;
		}
		d = (d + 1) % 4;
		x = x + dx[d];
		y = y + dy[d];
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			printf("%03d ", res[i][j]);
		}
		printf("\n");
	}
	return 0;
}