C++ 代码

//找规律发现第一斜行，啥也看不出来QWQ
//第二斜行右上到到左下；第三斜行从左下到右上；后面一样；第一斜行也可以看成左下到右上；这样左右分开；就OK了；
#include <iostream>
using namespace std;
const int N=501;
int a[N][N];
int main() {
    int m, n;
    cin >> n;
    for (int i = 1; i <= n; ++i)
        for (int j = 1; j <= n; ++j)
            cin >> a[i][j];
    for (int i = 2; i <=2*n ; ++i)
    {
        if (i%2==1)
        for (int j = 1; j < i; ++j)
        {
            int k=i-j;
            if (k<=n&&j<=n)
            cout<<a[j][k]<<" ";
        }
        else for (int j = 1; j < i; ++j)
            {
                int k=i-j;
                if (k<=n&&j<=n)
                cout<<a[k][j]<<" ";
            }
    }    
}