#include<iostream>
using namespace std;
int cube[40][40];
int main(){
	int n,mid;
	cin>>n;
	mid=(n+1)/2;
	cube[0][mid-1]=1;
	int x=0,y=mid-1;//x=hang y=lie
	for(int i=2;i<=n*n;i++){
		if(x==0&&y!=n-1){
			cube[n-1][y+1]=i;
			x=n-1;
			y+=1;
		}else if(y==n-1&&x!=0){
			cube[x-1][0]=i;
			x-=1;
			y=0;
		}else if(x==0&&y==n-1){
			cube[x+1][y]=i;
			x+=1;
		}else if(x!=0&&y!=n-1&&cube[x-1][y+1]==0){
			cube[x-1][y+1]=i;
			x-=1;
			y+=1;
		}else if(x!=0&&y!=n-1&&cube[x-1][y+1]!=0){
			cube[x+1][y]=i;
			x+=1;
		}
	}
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			cout<<cube[i][j]<<' ';
		}
		cout<<endl;
	}
	return 0;
}

很好的一道模拟题