https://www.i-garden.org/blog/2018/04/02/%e9%81%8b%e7%ae%97%e6%80%9d%e7%b6%ad-%e7%a8%8b%e5%bc%8f%e7%b7%a8%e5%af%ab%e5%ad%b8%e7%bf%92-algorithm-%e7%94%9a%e9%ba%bc%e6%98%af%e7%ae%97%e6%b3%95/
運算思維及程式編寫學習系列 (9) – 甚麼是算法? (What is Algorithm?)(上)