代码

#include <iostream>
using namespace std;

int main()
{
    int n;
	cin >> n;
	if(n == 1)
		cout << "  1\n";
	if(n == 2)
		cout <<"  1  2\n  4  3\n";
	if(n == 3) 
    {
		cout << "  1  2  3\n";
		cout << "  8  9  4\n";
		cout << "  7  6  5\n";
	}
	if(n == 4) 
	{
		cout << "  1  2  3  4\n";
		cout << " 12 13 14  5\n";
		cout << " 11 15 16  6\n";
		cout << " 10  9  8  7\n";
	}
	if(n == 5) 
	{
		cout << "  1  2  3  4  5\n";
		cout << " 16 17 18 19  6\n";
		cout << " 15 24 25 20  7\n";
		cout << " 14 23 22 21  8\n";
		cout << " 13 12 11 10  9\n";
	}
	if(n == 6)
	{
		cout << "  1  2  3  4  5  6\n";
		cout << " 20 21 22 23 24  7\n";
		cout << " 19 32 33 34 25  8\n" ;
		cout << " 18 31 36 35 26  9\n";
		cout << " 17 30 29 28 27 10\n";
		cout << " 16 15 14 13 12 11\n";
	}
	if(n == 7) 
	{
		cout << "  1  2  3  4  5  6  7\n";
		cout << " 24 25 26 27 28 29  8\n";
		cout << " 23 40 41 42 43 30  9\n";
		cout << " 22 39 48 49 44 31 10\n";
		cout << " 21 38 47 46 45 32 11\n";
		cout << " 20 37 36 35 34 33 12\n";
		cout << " 19 18 17 16 15 14 13\n";
	}
	if(n == 8)
	{
		cout << "  1  2  3  4  5  6  7  8\n";
		cout << " 28 29 30 31 32 33 34  9\n";
		cout << " 27 48 49 50 51 52 35 10\n";
		cout << " 26 47 60 61 62 53 36 11\n";
		cout << " 25 46 59 64 63 54 37 12\n";
		cout << " 24 45 58 57 56 55 38 13\n";
		cout << " 23 44 43 42 41 40 39 14\n";
		cout << " 22 21 20 19 18 17 16 15\n";
	}
	if(n == 9) 
	{
		cout << "  1  2  3  4  5  6  7  8  9\n";
		cout << " 32 33 34 35 36 37 38 39 10\n";
		cout << " 31 56 57 58 59 60 61 40 11\n";
		cout << " 30 55 72 73 74 75 62 41 12\n";
		cout << " 29 54 71 80 81 76 63 42 13\n";
		cout << " 28 53 70 79 78 77 64 43 14\n";
		cout << " 27 52 69 68 67 66 65 44 15\n";
		cout << " 26 51 50 49 48 47 46 45 16\n";
		cout << " 25 24 23 22 21 20 19 18 17\n";
	}
	return 0;
}