#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
    cin>>n;
    int a[n][n],i=0,j=n-1,t=1;
    memset(a,0,sizeof(a));
    a[i][j]=1;
    while(t!=n*n){
        while(a[i+1][j]==0&&i+1<n){
            a[++i][j]=++t;
        }
        while(a[i][j-1]==0&&j-1>=0){
            a[i][--j]=++t;
        }
        while(a[i-1][j]==0&&i-1>=0){
            a[--i][j]=++t;
        }
        while(a[i][j+1]==0&&j+1<n){
             a[i][++j]=++t;
         }
    }
    for(int i=0;i<n;i++){
	         for(int j=0;j<n;j++){
            cout<<a[i][j]<<" ";
			         }
        cout<<endl;
     }
}