Editorial: Coding set 4

Good for whiteboarding

• 1644. Lowest Common Ancestor of a Binary Tree II
• 1650. Lowest Common Ancestor of a Binary Tree III
• 1367. Linked List in Binary Tree
• 668. Kth Smallest Number in Multiplication Table
• 866. Prime Palindrome
• 996. Number of Squareful Arrays

1494. Parallel Courses II

• My gut feeling was wrong
• Took me too long

Basic Calculator

• Multiple solutions
• Follow up:
• Support a ternary operator like in Java.
• A method to print the expression string that identicaly to the input, preserves all the formats like extra spaces.

Create Maximum Number

• My gut feeling was wrong

312. Burst Balloons

• Was not able to see the insight