Mark As Completed Discussion

Build your intuition. Fill in the missing part by typing it in.

All the values below the diagonal are ___ because they are invalid subsequences.

Write the missing line below.

Programming Categories

  • Basic Arrays Interview Questions
  • Binary Search Trees Interview Questions
  • Dynamic Programming Interview Questions
  • Easy Strings Interview Questions
  • Frontend Interview Questions
  • Graphs Interview Questions
  • Hard Arrays Interview Questions
  • Hard Strings Interview Questions
  • Hash Maps Interview Questions
  • Linked Lists Interview Questions
  • Medium Arrays Interview Questions
  • Queues Interview Questions
  • Recursion Interview Questions
  • Sorting Interview Questions
  • Stacks Interview Questions
  • Systems Design Interview Questions
  • Trees Interview Questions

    • Popular Lessons

  • All Courses, Lessons, and Challenges
  • Data Structures Cheat Sheet
  • Free Coding Videos
  • Bit Manipulation Interview Questions
  • Javascript Interview Questions
  • Python Interview Questions
  • Java Interview Questions
  • SQL Interview Questions
  • QA and Testing Interview Questions
  • Data Engineering Interview Questions
  • Data Science Interview Questions
  • Blockchain Interview Questions
  • Introduction to C++ Projects
  • Introduction to Arrays and Array Operations
  • CSS Frameworks
  • Introduction to Network Topologies
  • Application Mastery