【NOIP】提高组2015 神奇的幻方

【算法】模拟

#include<cstdio>
const int maxn=45;
int n,a[maxn][maxn];
int main()
{
    scanf("%d",&n);
    int x=1,y=n/2+1;
    a[x][y]=1;
    for(int i=2;i<=n*n;i++)
     {
         if(x==1&&y!=n)x=n,y=y+1;else
         if(x!=1&&y==n)x=x-1,y=1;else
         if(x==1&&y==n)x=2,y=n;else
         if(x!=1&&y!=n)
          if(a[x-1][y+1])x=x+1;
           else x=x-1,y=y+1;
         a[x][y]=i;
//         printf("[%d]%d %d\n",i,x,y);
     }
    for(int i=1;i<=n;i++)
     {
         for(int j=1;j<n;j++)printf("%d ",a[i][j]);
         printf("%d\n",a[i][n]);
     }
    return 0;
}