<img src="https://img-blog.youkuaiyun.com/20150203140615497?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMDkwNjYzNg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />
<span style="font-size:14px;">
m=(n+1)/2;
for(i=1;i<=n:i++)
{
for(j=1;j<=n:j++)
{
if(i+j<=n+1&&i<=j||i+j>=n+1&&i>=j)
a[i][j] = m-abs(m-j);
if(i+j<n+1&&i>j||i+j>n+1&&i<j)
a[i][j] = m-abs(m-i);
}
<pre name="code" class="cpp"><pre name="code" class="cpp"> }</span>