为什么提交之后是错的呢？输出样例看起来没什么问题。

#include <iostream>

using namespace std;

int num[12][12] = { 0 };
int n, x = 1, y = 0, k = 1;
int main()
{
	cin >> n;
	while (k<=n*n)
	{
		while (y<n&&!num[x][y+1])
		{
			num[x][++y] = k++;
		}
		while (x<n&&!num[x+1][y])
		{
			num[++x][y] = k++;
		}
		while (x > 1 && !num[x - 1][y])
		{
			num[--x][y] = k++;
		}
		while (y > 1 && !num[x][y - 1])
		{
			num[x][--y] = k++;
		}
	}
	for (int i = 1; i <= n; i++)
	{
		for (int j = 1; j <= n; j++)
		{
			if (num[i][j] < 10)
				cout << " " << num[i][j] << " ";
			else
				cout << num[i][j] << " ";
		}
		cout << endl;
	}
	return 0;
}