傻逼暴力法画蛇皮矩阵图

#include <iostream>
#include<cmath>
#include "algorithm"
#include "cstdio"
#include "stack"
using namespace std;
//bool cmp(const int a, const int b)
//{
//    return a<b;
//}

int main()
{
    int n;
    cin >> 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<i-1;j++)
        {
            a[k-2-j][k-1] = (i-2)*(i-2) + 1 + j;
            a[n-k][k-2-j] =  (i-2)*(i-2) + i + j;
            a[j+1+n-k][n-k] = (i-2)*(i-2) + 2*i - 1 + j;
            a[k-1][j+1+n-k] = (i-2)*(i-2) + 3*i - 2 + j;
        }
    }int sum = 0;
    for(i=0;i<n;i++)
    {
        sum = sum + a[i][i];
        sum = sum + a[i][n-i-1];
    }

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

    return 0;
}

写了一个小时不想就这么删了，虽然没啥用