#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;
#ifdef _WIN32
#include <Windows.h>
#endif

int main()
{
    int n, x = 0, y = 0, num = 1, dir = 0;
    int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
    cin >> n;
    vector<vector<int>> v(n, vector<int>(n, 0));
    for (int i = 0; i < n*n; i++){
        v[y][x] = i + 1;
        int tx = x + dx[dir%4], ty = y + dy[dir%4];
        if ((tx >= n) || (ty >= n) || (tx < 0) || (ty < 0) || (v[ty][tx] != 0)) dir++;
        x += dx[dir%4];
        y += dy[dir%4];
    }
    for (int i = 0; i < n; i++){
        for (int j = 0; j < n; j++){
            printf("%03d", v[i][j]);
            cout << ((j != n-1) ? " " : "\n");
        }
    }
}