#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
using ll = long long ;
using P = pair<int,int> ;
using pll = pair<long long,long long>;
constexpr int INF = 1e9;
constexpr long long LINF = 1e17;
constexpr int MOD = 1000000007;
constexpr double PI = 3.14159265358979323846;
vector<int> dx = {0,1,0,-1};
vector<int> dy = {1,0,-1,0};

int main(){
    int n;
    cin >> n;
    vector<vector<int>> maze(n,vector<int>(n,-1));
    int i = 0,j = 0,d = 0;
    for(int k=1;k<=n*n;k++){
        //cout << i << " " << j << endl;
        maze[i][j] = k;
        int new_i = i + dx[d];
        int new_j = j + dy[d];
        if(new_i < 0 || new_j < 0 || n <= new_i || n <= new_j){
            i += dx[(d+1)%4];
            j += dy[(d+1)%4];
            d = (d+1)%4;
        }else if(maze[new_i][new_j]>0){
            i += dx[(d+1)%4];
            j += dy[(d+1)%4];
            d = (d+1)%4;
        }else{
            i = new_i;
            j = new_j;
        }
    }
    
    rep(i,n){
        rep(j,n) printf("%03d ",maze[i][j]);
        cout << endl;
    }
    
    return 0;
}