Good for whiteboarding

Champagne Tower

  • My first attempt was wrong

Number of Subarrays with Bounded Maximum

  • Corner case

988. Smallest String Starting From Leaf

  • My optimization was wrong

Additive Number

  • First attempt missed a corner case

Super Pow

  • My gut feeling was wrong

Longest Word in Dictionary through Deleting

  • Official insight is cleaner than mine
  • First attempt missed a corner case