蛇形填数

<span style="font-size:18px;">#include<iostream>
#include<algorithm>
#include<stdio.h>
using namespace std;
int main()
{
	int n,i,j,t,x,y;
	
	while(cin>>n)
	{
		int a[100][100]={0};
		t=a[0][n-1]=1;
		x=0;
		y=n-1;
		while(t<n*n)
		{
			while(x+1<n&&a[x+1][y]==0) a[++x][y]=++t;
			while(y-1>=0&&a[x][y-1]==0) a[x][--y]=++t;
			while(x-1>=0&&a[x-1][y]==0) a[--x][y]=++t;
			while(y+1<n&&a[x][y+1]==0) a[x][++y]=++t;

		}
		for(i=0;i<n;i++)
		{
			for(j=0;j<n;j++)
			{
				if(j==n-1)
					cout<<a[i][j]<<endl;
				else
					cout<<a[i][j]<<" ";
			}
		}

	}
	return 0;
}</span>