#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

int main() {
    int n;
    cin >> n;

    int p[32][32] = {};
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            p[i + 1][j + 1] = -1;
        }
    }

    int i = 1, j = 1, vi = 0, vj = 1;
    int k = 1;
    for (;;) {
        p[i][j] = k++;
        if (p[i + vi][j + vj] >= 0) {
            int t = vi; vi = vj; vj = -t;
        }
        if (p[i + vi][j + vj] >= 0) {
            break;
        }
        i += vi;
        j += vj;
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            printf("%03d%c", p[i + 1][j + 1], " \n"[j == n - 1]);
        }
    }

    return 0;
}