Dashboard Questions Topics Companies Sheets

Two Pointers

Topic

209 coding problems covering Two Pointers concepts. Master this topic and improve your problem-solving skills.

209

Problems

Easy

125

Medium

Hard

Difficulty

All209 Easy59 Medium125 Hard25

Title	Solve	Difficulty	Companies	Topics
5. Longest Palindromic Substring	Solve	Medium	Accenture+50	Dynamic Programming String+1
11. Container With Most Water	Solve	Medium	Adobe+8	Array Greedy+1
15. 3Sum	Solve	Medium	Adobe+21	Array Sorting+1
16. 3Sum Closest	Solve	Medium	Adobe+6	Array Sorting+1
18. 4Sum	Solve	Medium	Adobe+8	Array Sorting+1
19. Remove Nth Node From End of List	Solve	Medium	Amazon+7	Linked List Two Pointers
26. Remove Duplicates from Sorted Array	Solve	Easy	Adobe+8	Array Two Pointers
27. Remove Element	Solve	Easy	Adobe+4	Array Two Pointers
28. Find the Index of the First Occurrence in a String	Solve	Easy	Amazon+4	String String Matching+1
31. Next Permutation	Solve	Medium	Adobe+19	Array Two Pointers
42. Trapping Rain Water	Solve	Hard	Adobe+21	Array Dynamic Programming+3
61. Rotate List	Solve	Medium	Bloomberg+1	Linked List Two Pointers
75. Sort Colors	Solve	Medium	Adobe+9	Array Sorting+1
80. Remove Duplicates from Sorted Array II	Solve	Medium	Adobe	Array Two Pointers
82. Remove Duplicates from Sorted List II	Solve	Medium	Amazon+2	Linked List Two Pointers
86. Partition List	Solve	Medium	Adobe+8	Linked List Two Pointers
88. Merge Sorted Array	Solve	Easy	Amazon+9	Array Sorting+1
125. Valid Palindrome	Solve	Easy	Adobe+8	String Two Pointers
141. Linked List Cycle	Solve	Easy	42gearMobilitySystems+131	Hash Table Linked List+1
142. Linked List Cycle II	Solve	Medium	Amazon+1	Hash Table Linked List+1
143. Reorder List	Solve	Medium	Adobe+6	Linked List Recursion+2
148. Sort List	Solve	Medium	Amazon+4	Divide and Conquer Linked List+3
151. Reverse Words in a String	Solve	Medium	Amazon+5	String Two Pointers
160. Intersection of Two Linked Lists	Solve	Easy	Adobe+7	Hash Table Linked List+1
161. One Edit Distance	Solve	Medium	Facebook+2	String Two Pointers
165. Compare Version Numbers	Solve	Medium	Amazon+3	String Two Pointers
167. Two Sum II - Input Array Is Sorted	Solve	Medium	Adobe+5	Array Binary Search+1
170. Two Sum III - Data structure design	Solve	Easy	LinkedIn	Array Data Stream+3
186. Reverse Words in a String II	Solve	Medium	Microsoft	String Two Pointers
189. Rotate Array	Solve	Medium	Amazon+6	Array Math+1
202. Happy Number	Solve	Easy	Adobe+5	Hash Table Math+1
234. Palindrome Linked List	Solve	Easy	Adobe+10	Linked List Recursion+2
244. Shortest Word Distance II	Solve	Medium	LinkedIn	Array Design+3
246. Strobogrammatic Number	Solve	Easy	Facebook+1	Hash Table String+1
251. Flatten 2D Vector	Solve	Medium	Airbnb	Array Design+2
253. Meeting Rooms II	Solve	Medium	Amazon+8	Array Greedy+4
259. 3Sum Smaller	Solve	Medium	Apple+2	Array Binary Search+2
272. Closest Binary Search Tree Value II	Solve	Hard	Google+1	Binary Search Tree Binary Tree+5
277. Find the Celebrity	Solve	Medium	Amazon+5	Graph Interactive+1
283. Move Zeroes	Solve	Easy	Adobe+11	Array Two Pointers
287. Find the Duplicate Number	Solve	Medium	Adobe+30	Array Binary Search+2
295. Find Median from Data Stream	Solve	Hard	Adobe+33	Data Stream Design+3
321. Create Maximum Number	Solve	Hard	Apple+1	Array Greedy+3
344. Reverse String	Solve	Easy	Adobe+6	String Two Pointers
345. Reverse Vowels of a String	Solve	Easy	Bloomberg	String Two Pointers
349. Intersection of Two Arrays	Solve	Easy	Adobe+7	Array Binary Search+3
350. Intersection of Two Arrays II	Solve	Easy	Adobe+4	Array Binary Search+3
360. Sort Transformed Array	Solve	Medium	LinkedIn	Array Math+2
392. Is Subsequence	Solve	Easy	Accolite+15	Dynamic Programming String+1
408. Valid Word Abbreviation	Solve	Easy	Facebook+1	String Two Pointers