Hard

Title	Difficulty	Companies	Videos
Sum of Consecutive Subsequences	Hard
Sum of Good Subsequences	Hard
Sum of Total Strength of Wizards	Hard
Tag Validator	Hard	google microsoft uber
The Number of Good Subsets	Hard
The Score of Students Solving Math Expression	Hard
The Wording Game	Hard
Three Equal Parts	Hard	hotstar
Time to Cross a Bridge	Hard
Tournament Winners	Hard	wayfair
User Purchase Platform	Hard	linkedin
Valid Palindrome 3 - Is string palindrome after deleting at most k chars	Hard	facebook google
Word Abbreviation	Hard	google grab snapchat uber
Year on Year Growth Rate	Hard
Apply Operations to Maximize Frequency Score	Hard
Booking Concert Tickets in Groups	Hard
Brace Expansion II	Hard	adobe google
Building Boxes	Hard
Car Fleet II	Hard
Cat and Mouse	Hard	google
Cat and Mouse II	Hard
Chalkboard XOR Game	Hard	garena
Check if an Original String Exists Given Two Encoded Strings	Hard
Check If It Is a Good Array	Hard	dropbox
Check if Point Is Reachable	Hard
Check if the Rectangle Corner Is Reachable	Hard
Closest Subsequence Sum	Hard
Construct 2D Grid Matching Graph Layout	Hard
Count Array Pairs Divisible by K	Hard
Count Beautiful Substrings II	Hard
Count Fertile Pyramids in a Land	Hard
Count Increasing Quadruplets	Hard
Count Integers in Intervals	Hard
Count K-Reducible Numbers Less Than N	Hard
Count K-Subsequences of a String With Maximum Beauty	Hard
Count Number of Possible Root Nodes	Hard
Count Pairs Of Nodes	Hard
Count Paths That Can Form a Palindrome in a Tree	Hard
Count Stepping Numbers in Range	Hard
Count Subtrees With Max Distance Between Cities	Hard
Count the Number of Houses at a Certain Distance II	Hard
Count The Number of Winning Sequences	Hard
Count Unique Characters of All Substrings of a Given String	Hard	forusall microsoft twitch
Count Visited Nodes in a Directed Graph	Hard
Couples Holding Hands	Hard	amazon google
Delete Duplicate Folders in System	Hard
Design a Text Editor	Hard
Design Movie Rental System	Hard
Distribute Elements Into Two Arrays II	Hard
Earliest Second to Mark Indices II	Hard