For learning -> interview

from leetcode\textbook\social media

start from MAR 21,2021

• It is easier to judge whether it is true or not by knowing the answer than to find the answer directly
  • => Binary
  • => Guaranteed to split the answer into two

• Grind 169
• Leetcode 100
• https://leetcode.ca/

List : empty? one elem?

Tree : root exist?

integer : 32bit?