Closed poweihuang17 closed 6 years ago
https://www.geeksforgeeks.org/sparse-matrix-representation/
https://www.google.com.tw/search?q=sparse+matrix&client=firefox-b-ab&dcr=0&tbm=vid&ei=ReC8WpncJIG40ASej6LQDw&start=0&sa=N&biw=1280&bih=635&dpr=2
https://www.geeksforgeeks.org/sparse-matrix-representation/