COVID-19について、データを扱う人間の端くれならFactは抑えておきたいなーと思っていたら素晴らしい報告書が。 https://www.who.int/docs/default-source/coronaviruse/who-china-joint-mission-on-covid-19-final-report.pdf?fbclid=IwAR1MMdhrYTO3f2W7XAJ…

https://leetcode.com/problems/power-of-two/ Given an integer, write a function to determine if it is a power of two. Example 1: Input: 1 Output: true Explanation: 20 = 1 Example 2: Input: 16 Output: true Explanation: 24 = 16 Example 3: Inp…