#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
//#include<cctype>
#include<climits>
#include<iostream>
#include<string>
#include<vector>
#include<map>
//#include<list>
#include<queue>
#include<deque>
#include<algorithm>
//#include<numeric>
#include<utility>
//#include<memory>
#include<functional>
#include<cassert>
#include<set>
#include<stack>
#include<random>

const int dx[] = {1, 0, -1, 0};
const int dy[] = {0, 1, 0, -1};
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef pair<int, int> pii;

string convert(int x) {
    string s = to_string(x);
    while (s.size() < 3) {
        s = '0'+s;
    }
    return s;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N;
    cin >> N;
    vector<vi> board(N, vi(N));
    int y = 0, x = 0, dir = 0;
    for (int i = 0; i < N*N; i++) {
        board[y][x] = i+1;
        while (N*N-i-1) {
            int ny = y+dy[dir], nx = x+dx[dir];
            if (ny < 0 || ny >= N || nx < 0 || nx >= N || board[ny][nx]) dir = (dir+1)%4;
            else {
                x = nx, y = ny;
                break;
            }
        }
    }
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++)
            cout << convert(board[i][j]) << (j < N-1 ? " " : "\n");
    }
    return 0;
}