Two Pointers Interview Questions

Two Pointers String Greedy

Rank

#88EasyFrequency: 92%

Merge Sorted Array

Rank

#1790MediumFrequency: 91%

Lowest Common Ancestor of a Binary Tree III

Hash Table Two Pointers Tree Binary Tree

Rank

#647MediumFrequency: 88%

Palindromic Substrings

Asked at Salesforce

Two Pointers String Dynamic Programming

Rank

#408EasyFrequency: 87%

Valid Word Abbreviation

Rank

#125EasyFrequency: 87%

Valid Palindrome

Asked at Oracle

Rank

#1894EasyFrequency: 80%

Merge Strings Alternately

#10

Rank

#1713MediumFrequency: 76%

Dot Product of Two Sparse Vectors

Array Hash Table Two Pointers Design

#11

Rank

#42HardFrequency: 74%

Trapping Rain Water

Array Two Pointers Dynamic Programming Stack Monotonic Stack

#12

Rank

#27EasyFrequency: 73%

Remove Element

Two Pointers Graph Interactive

#13

Rank

#277MediumFrequency: 72%

Find the Celebrity

Asked at LinkedIn

#14

Rank

#1028MediumFrequency: 69%

Interval List Intersections

#15

Rank

#283EasyFrequency: 66%

Move Zeroes

#16

Rank

#1019EasyFrequency: 63%

Squares of a Sorted Array

Asked at Uber

Array Hash Table Two Pointers String Design

#17

Rank

#244MediumFrequency: 63%

Shortest Word Distance II

Asked at LinkedIn

#18

Rank

#31MediumFrequency: 62%

Next Permutation

Array Two Pointers Greedy Sorting Heap (Priority Queue)Prefix Sum

#19

Rank

#253MediumFrequency: 62%

Meeting Rooms II

Asked at TikTok

#20

Rank

#2414MediumFrequency: 60%

Move Pieces to Obtain a String

#21

Rank

#15MediumFrequency: 60%

3Sum

#22

Rank

#3018MediumFrequency: 60%

Make String a Subsequence Using Cyclic Increments

#23

Rank

#5MediumFrequency: 55%

Longest Palindromic Substring

Two Pointers String Dynamic Programming

#24

Rank

#18MediumFrequency: 55%

4Sum

#25

Rank

#167MediumFrequency: 55%

Two Sum II - Input Array Is Sorted

Array Two Pointers Binary Search

#26

Rank

#567MediumFrequency: 55%

Permutation in String

Hash Table Two Pointers String Sliding Window

#27

Rank

#1468EasyFrequency: 55%

Check If N and Its Double Exist

Array Hash Table Two Pointers Binary Search Sorting

#28

Rank

#1566EasyFrequency: 55%

Check If a Word Occurs As a Prefix of Any Word in a Sentence

Two Pointers String String Matching

#29

Rank

#26EasyFrequency: 53%

Remove Duplicates from Sorted Array

#30

Rank

#141EasyFrequency: 53%

Linked List Cycle

Hash Table Linked List Two Pointers

#31

Rank

#28EasyFrequency: 48%

Find the Index of the First Occurrence in a String

Two Pointers String String Matching

#32

Rank

#234EasyFrequency: 48%

Palindrome Linked List

Linked List Two Pointers Stack Recursion

#33

Rank

#2232MediumFrequency: 48%

Adding Spaces to a String

Array Two Pointers String Simulation

#34

Rank

#151MediumFrequency: 45%

Reverse Words in a String

#35

Rank

#19MediumFrequency: 43%

Remove Nth Node From End of List

Linked List Two Pointers

#36

Rank

#11MediumFrequency: 42%

Container With Most Water

Array Two Pointers Greedy

#37

Rank

#75MediumFrequency: 42%

Sort Colors

#38

Rank

#852MediumFrequency: 37%

Friends Of Appropriate Ages

Array Two Pointers Binary Search Sorting

#39

Rank

#80MediumFrequency: 36%

Remove Duplicates from Sorted Array II