Hard

Title	Difficulty	Companies	Videos
Maximum XOR of Two Non-Overlapping Subtrees	Hard
Maximum XOR Score Subarray Queries	Hard
Memoize II	Hard
Merge BSTs to Create Single BST	Hard
Minimize the Maximum Adjacent Element Difference	Hard
Minimize the Total Price of the Trips	Hard
Minimum Changes to Make K Semi-palindromes	Hard
Minimum Cost to Change the Final Value of Expression	Hard
Minimum Cost to Convert String II	Hard
Minimum Degree of a Connected Trio in a Graph	Hard
Minimum Edge Reversals So Every Node Is Reachable	Hard
Minimum Money Required Before Transactions	Hard
Minimum Moves to Move a Box to Their Target Location	Hard
Minimum Moves to Pick K Ones	Hard
Minimum Number of Flips to Convert Binary Matrix to Zero Matrix	Hard	airbnb google
Minimum Number of Increments on Subarrays to Form a Target Array	Hard	google
Minimum Number of K Consecutive Bit Flips	Hard	akuna akuna-capital amazon facebook
Minimum Operations to Form Subsequence With Target Sum	Hard
Minimum Operations to Make the Array K-Increasing	Hard
Minimum Operations to Remove Adjacent Ones in Matrix	Hard
Minimum Relative Loss After Buying Chocolates	Hard
Minimum Replacements to Sort the Array	Hard
Minimum Reverse Operations	Hard
Minimum Score After Removals on a Tree	Hard
Minimum Time For K Virus Variants to Spread	Hard
Minimum Time Takes to Reach Destination Without Drowning	Hard
Minimum Time to Complete All Tasks	Hard
Minimum Time to Revert Word to Initial State II	Hard
Minimum Time to Visit a Cell In a Grid	Hard
Minimum Window Subsequence	Hard	amazon bloomberg ebay google houzz microsoft
Number of Beautiful Integers in the Range	Hard
Number of Different Subsequences GCDs	Hard
Number of Great Partitions	Hard
Number of Possible Sets of Closing Branches	Hard
Number of Ships in a Rectangle	Hard	bloomberg
Number of Subarrays That Match a Pattern II	Hard
Number of Transactions per Visit	Hard	machine-zone machinezone
Number of Valid Subarrays	Hard	hulu
Number of Visible People in a Queue	Hard
Number of Ways to Earn Points	Hard
Number of Ways to Reach Destination in the Grid	Hard
Number Of Ways To Reconstruct A Tree	Hard
Parse Lisp Expression	Hard	affirm google
Paths in Matrix Whose Sum Is Divisible by K	Hard
Preimage Size of Factorial Zeroes Function	Hard	adobe
Rank Transform of a Matrix	Hard
Redundant Connection II	Hard	google
Report Contiguous Dates	Hard	facebook
Selling Pieces of Wood	Hard
Set Intersection Size At Least Two	Hard	drawbridge uber