Median of Two Sorted Arrays

median-of-two-sorted-arrays

Trapping Rain Water

trapping-rain-water

Permutations

permutations

Number of Islands

number-of-islands

Meeting Rooms II

meeting-rooms-ii

First Unique Character in a String

first-unique-character-in-a-string

Count Binary Substrings

count-binary-substrings

Design HashMap

design-hashmap

Minimum Value to Get Positive Step by Step Sum

minimum-value-to-get-positive-step-by-step-sum

Check if the Sentence Is Pangram

check-if-the-sentence-is-pangram

Count Palindromic Subsequences

count-palindromic-subsequences

Two Sum

two-sum

Longest Substring Without Repeating Characters

longest-substring-without-repeating-characters

Longest Palindromic Substring

longest-palindromic-substring

Valid Parentheses

valid-parentheses

Jump Game II

jump-game-ii

Group Anagrams

group-anagrams

Minimum Path Sum

minimum-path-sum

Best Time to Buy and Sell Stock

best-time-to-buy-and-sell-stock

LRU Cache

lru-cache

Valid Anagram

valid-anagram

Find the Duplicate Number

find-the-duplicate-number

Counting Bits

counting-bits

Number of Provinces

number-of-provinces

Palindromic Substrings

palindromic-substrings

Count Different Palindromic Subsequences

count-different-palindromic-subsequences

Contain Virus

contain-virus

Reaching Points

reaching-points

Rotting Oranges

rotting-oranges

Pairs of Songs With Total Durations Divisible by 60

pairs-of-songs-with-total-durations-divisible-by-60

Break a Palindrome

break-a-palindrome

Remove All Adjacent Duplicates in String II

remove-all-adjacent-duplicates-in-string-ii

Sort Integers by The Number of 1 Bits

sort-integers-by-the-number-of-1-bits

Max Difference You Can Get From Changing an Integer

max-difference-you-can-get-from-changing-an-integer

Remove Duplicates From an Unsorted Linked List

remove-duplicates-from-an-unsorted-linked-list

Construct Smallest Number From DI String

construct-smallest-number-from-di-string

String to Integer (atoi)

string-to-integer-atoi

Container With Most Water

container-with-most-water

Roman to Integer

roman-to-integer

3Sum

3sum

3Sum Closest

3sum-closest

Letter Combinations of a Phone Number

letter-combinations-of-a-phone-number

Generate Parentheses

generate-parentheses

Merge k Sorted Lists

merge-k-sorted-lists

Next Permutation

next-permutation

Longest Valid Parentheses

longest-valid-parentheses

Search in Rotated Sorted Array

search-in-rotated-sorted-array

Combination Sum

combination-sum

Pow(x, n)

powx-n

N-Queens

n-queens

Maximum Subarray

maximum-subarray

Merge Intervals

merge-intervals

Unique Paths

unique-paths

Unique Paths II

unique-paths-ii

Climbing Stairs

climbing-stairs

Search a 2D Matrix

search-a-2d-matrix

Subsets

subsets

Word Search

word-search

Merge Sorted Array

merge-sorted-array

Decode Ways

decode-ways

Binary Tree Inorder Traversal

binary-tree-inorder-traversal

Symmetric Tree

symmetric-tree

Minimum Depth of Binary Tree

minimum-depth-of-binary-tree

Pascal's Triangle

pascals-triangle

Pascal's Triangle II

pascals-triangle-ii

Best Time to Buy and Sell Stock II

best-time-to-buy-and-sell-stock-ii

Valid Palindrome

valid-palindrome

Word Ladder

word-ladder

Gas Station

gas-station

Candy

candy

Linked List Cycle

linked-list-cycle

Find Minimum in Rotated Sorted Array

find-minimum-in-rotated-sorted-array

Min Stack

min-stack

Intersection of Two Linked Lists

intersection-of-two-linked-lists

Fraction to Recurring Decimal

fraction-to-recurring-decimal

Excel Sheet Column Title

excel-sheet-column-title

Largest Number

largest-number

House Robber

house-robber

Implement Trie (Prefix Tree)

implement-trie-prefix-tree

Minimum Size Subarray Sum

minimum-size-subarray-sum

Course Schedule II

course-schedule-ii

Word Search II

word-search-ii

Kth Largest Element in an Array

kth-largest-element-in-an-array

Count Complete Tree Nodes

count-complete-tree-nodes

Implement Queue using Stacks

implement-queue-using-stacks

Lowest Common Ancestor of a Binary Tree

lowest-common-ancestor-of-a-binary-tree

Delete Node in a Linked List

delete-node-in-a-linked-list

Product of Array Except Self

product-of-array-except-self

Sliding Window Maximum

sliding-window-maximum

Search a 2D Matrix II

search-a-2d-matrix-ii

Shortest Word Distance

shortest-word-distance

3Sum Smaller

3sum-smaller

First Bad Version

first-bad-version

Move Zeroes

move-zeroes

Coin Change

coin-change

Decode String

decode-string

Evaluate Division

evaluate-division

Pacific Atlantic Water Flow

pacific-atlantic-water-flow

Find All Anagrams in a String

find-all-anagrams-in-a-string

String Compression

string-compression

Add Two Numbers II

add-two-numbers-ii

Goldman Sachs

#	Title	Difficulty	Frequency
4	Median of Two Sorted Arrays	Hard	1.04
42	Trapping Rain Water	Hard	2.75
46	Permutations	Medium	1.34
200	Number of Islands	Medium	3.29
253	Meeting Rooms II	Medium	7.52
387	First Unique Character in a String	Easy	3.68
696	Count Binary Substrings	Easy	23.92
706	Design HashMap	Easy	9.98
1413	Minimum Value to Get Positive Step by Step Sum	Easy	17.44
1832	Check if the Sentence Is Pangram	Easy	6.92
2484	Count Palindromic Subsequences	Hard	31.37