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# include <bits/stdc++.h>
using namespace std ;
const int N = 40 ;
int n ; //一个n*n的幻方
int g [ N ] [ N ] ; //一个二维数组用来存储幻方
int x , y ; //用来记录上一个位置
int main ( ) {
cin > > n ;
//1≤N≤39 且 N 为奇数。
//(1)首先，
g [ 1 ] [ n / 2 + 1 ] = 1 ; // n/2+1，
//记录上一个放置的位置【这个很重要，一定要记录上一次的位置！！！】
x = 1 ;
y = n / 2 + 1 ;
//尝试将2-n^2的数字放入 [核心思想：上一个位置]
for ( int i = 2 ; i < = n * n ; i + + ) {
if ( x = = 1 & & y ! = n ) g [ n ] [ y + 1 ] = i , x = n , y + + ;
else if ( y = = n & & x ! = 1 ) g [ x - 1 ] [ 1 ] = i , x - - , y = 1 ;
else if ( x = = 1 & & y = = n ) g [ 2 ] [ n ] = i , x = 2 ;
else if ( x ! = 1 & & y ! = n ) {
if ( g [ x - 1 ] [ y + 1 ] = = 0 ) g [ x - 1 ] [ y + 1 ] = i , x - - , y + + ;
else g [ x + 1 ] [ y ] = i , x + + ;
}
}
//输出
for ( int i = 1 ; i < = n ; i + + ) {
for ( int j = 1 ; j < = n ; j + + )
cout < < g [ i ] [ j ] < < " " ;
cout < < endl ;
}
return 0 ;
}
