#include 
     
      #include
      
       #include "algorithm"#include "cstdio"#include "stack"using namespace std;//bool cmp(const int a, const int b)//{//    return a
       
        > n;    int a[n][n];    int i,j,k;    a[n/2][n/2] = 1;    for(i = n,k = n;i>1 && k > n/2; i = i-2 ,k --)    {        for(j = 0;j
       
      
     

写了一个小时不想就这么删了，虽然没啥用