1319. Hotel

/*
 * Rijoanul Hasan
 * Timus 1319. Hotel
 * C++
*/

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

int main()
{
    int n;
    while(cin >> n)
    {
        int array[n][n];
        int i, j, k, value = 0;
        for(i = n-1; i >= 0; i--)
        {
            k = 0;
            for(j = i; j < n; j++)
            {
                array[k++][j] = ++value;
                //cout << k-1 << j << ' ' << value << endl;
            }
        }
        for(i = n-1; i >= 0; i--)
        {
            k = n-i;
            for(j = 0; j < i; j++)
            {
                array[k++][j] = ++value;
                //cout << k-1 << j << ' ' << value << endl;
            }
        }
        for(i = 0; i < n; i++)
        {
            for(j = 0; j < n; j++)
            {
                cout << array[i][j];
                if(j != n) cout << ' ';
            }
            cout << endl;
        }
    }

    return 0;
}