Count and Say

count-and-say

Find K-th Smallest Pair Distance

find-k-th-smallest-pair-distance

Unique Paths III

unique-paths-iii

Shortest Path in a Grid with Obstacles Elimination

shortest-path-in-a-grid-with-obstacles-elimination

Jump Game III

jump-game-iii

Merge Intervals

merge-intervals

Reorganize String

reorganize-string

Minimize Result by Adding Parentheses to Expression

minimize-result-by-adding-parentheses-to-expression

Valid Sudoku

valid-sudoku

Clone Graph

clone-graph

Implement Trie (Prefix Tree)

implement-trie-prefix-tree

Alien Dictionary

alien-dictionary

Find the Celebrity

find-the-celebrity

Word Pattern II

word-pattern-ii

Serialize and Deserialize Binary Tree

serialize-and-deserialize-binary-tree

Number of Connected Components in an Undirected Graph

number-of-connected-components-in-an-undirected-graph

Longest Increasing Path in a Matrix

longest-increasing-path-in-a-matrix

Design Hit Counter

design-hit-counter

String Compression

string-compression

Task Scheduler

task-scheduler

Smallest Range Covering Elements from K Lists

smallest-range-covering-elements-from-k-lists

Accounts Merge

accounts-merge

Employee Free Time

employee-free-time

Random Pick with Blacklist

random-pick-with-blacklist

Parallel Courses III

parallel-courses-iii

Is Subsequence

is-subsequence

Find Median Given Frequency of Numbers

find-median-given-frequency-of-numbers

Longest Word in Dictionary

longest-word-in-dictionary

Pinterest

#	Title	Difficulty	Frequency
38	Count and Say	Medium	38.57
719	Find K-th Smallest Pair Distance	Hard	69.33
980	Unique Paths III	Hard	21.83
1293	Shortest Path in a Grid with Obstacles Elimination	Hard	20.17
1306	Jump Game III	Medium	49.16