Unit 3: Big O Notation TODO PreWork Session #1 Session #2 HackerRank Additional Exercises PreWork Reading https://courses.codepath.org/courses/advanced_software_eng/unit/3#!links Required Challenges Sort characters by frequency - Medium Daily temperatures - Medium Session #1 Walkthrough Smallest Range Covering Elements from K Lists - Hard Basic Calc Asteroid Collision Session #2 Additional Exercises Smallest Range Covering Elements from K Lists Largest Rectangle in Histogram