Dashboard Questions Topics Companies Sheets

Stack

Topic

163 coding problems covering Stack concepts. Master this topic and improve your problem-solving skills.

163

Problems

Easy

Medium

Hard

Difficulty

All163 Easy23 Medium92 Hard48

Title	Solve	Difficulty	Companies	Topics
32. Longest Valid Parentheses	Solve	Hard	Amazon+6	Dynamic Programming Stack+1
42. Trapping Rain Water	Solve	Hard	Adobe+21	Array Dynamic Programming+3
84. Largest Rectangle in Histogram	Solve	Hard	Adobe+7	Array Monotonic Stack+1
85. Maximal Rectangle	Solve	Hard	Amazon+2	Array Dynamic Programming+3
224. Basic Calculator	Solve	Hard	Adobe+8	Math Recursion+2
272. Closest Binary Search Tree Value II	Solve	Hard	Google+1	Binary Search Tree Binary Tree+5
321. Create Maximum Number	Solve	Hard	Apple+1	Array Greedy+3
488. Zuma Game	Solve	Hard	Baidu+2	Breadth-First Search Dynamic Programming+3
591. Tag Validator	Solve	Hard	Airbnb+1	Stack String
716. Max Stack	Solve	Hard	Amazon+6	Design Doubly-Linked List+3
726. Number of Atoms	Solve	Hard	Amazon+5	Hash Table Sorting+2
736. Parse Lisp Expression	Solve	Hard	Affirm	Hash Table Recursion+2
768. Max Chunks To Make Sorted II	Solve	Hard	Adobe+6	Array Greedy+3
770. Basic Calculator IV	Solve	Hard	Adobe+1	Hash Table Math+3
772. Basic Calculator III	Solve	Hard	Amazon+12	Math Recursion+2
895. Maximum Frequency Stack	Solve	Hard	Adobe+7	Design Hash Table+2
936. Stamping The Sequence	Solve	Hard	-	Greedy Queue+2
975. Odd Even Jump	Solve	Hard	Google+1	Array Dynamic Programming+3
1063. Number of Valid Subarrays	Solve	Hard	Amazon+1	Array Monotonic Stack+1
1096. Brace Expansion II	Solve	Hard	Google	Backtracking Breadth-First Search+2
1106. Parsing A Boolean Expression	Solve	Hard	Affinity+1	Recursion Stack+1
1172. Dinner Plate Stacks	Solve	Hard	-	Design Hash Table+2
1526. Minimum Number of Increments on Subarrays to Form a Target Array	Solve	Hard	Google	Array Dynamic Programming+3
1597. Build Binary Expression Tree From Infix Expression	Solve	Hard	Amazon+1	Binary Tree Stack+2
1776. Car Fleet II	Solve	Hard	Google	Array Heap (Priority Queue)+3
1793. Maximum Score of a Good Subarray	Solve	Hard	Google	Array Binary Search+3
1896. Minimum Cost to Change the Final Value of Expression	Solve	Hard	Google	Dynamic Programming Math+2
1944. Number of Visible People in a Queue	Solve	Hard	Amazon+5	Array Monotonic Stack+1
2019. The Score of Students Solving Math Expression	Solve	Hard	Flipkart	Array Dynamic Programming+4
2030. Smallest K-Length Subsequence With Occurrences of a Letter	Solve	Hard	Deutsche Bank	Greedy Monotonic Stack+2
2197. Replace Non-Coprime Numbers in Array	Solve	Hard	Amazon	Array Math+2
2254. Design Video Sharing Platform	Solve	Hard	Google	Design Hash Table+2
2281. Sum of Total Strength of Wizards	Solve	Hard	Amazon+1	Array Monotonic Stack+2
2296. Design a Text Editor	Solve	Hard	Amazon+4	Design Doubly-Linked List+4
2334. Subarray With Elements Greater Than Varying Threshold	Solve	Hard	Google	Array Monotonic Stack+2
2355. Maximum Number of Books You Can Take	Solve	Hard	Amazon	Array Dynamic Programming+2
2454. Next Greater Element IV	Solve	Hard	-	Array Binary Search+4
2524. Maximum Frequency Score of a Subarray	Solve	Hard	PayPal	Array Hash Table+3
2589. Minimum Time to Complete All Tasks	Solve	Hard	-	Array Binary Search+3
2617. Minimum Number of Visited Cells in a Grid	Solve	Hard	Huawei	Array Breadth-First Search+6
2736. Maximum Sum Queries	Solve	Hard	-	Array Binary Indexed Tree+5
2751. Robot Collisions	Solve	Hard	Deutsche Bank+1	Array Simulation+2
2813. Maximum Elegance of a K-Length Subsequence	Solve	Hard	-	Array Greedy+4
2818. Apply Operations to Maximize Score	Solve	Hard	-	Array Greedy+4
2940. Find Building Where Alice and Bob Can Meet	Solve	Hard	Infosys	Array Binary Indexed Tree+5
2945. Find Maximum Non-decreasing Array Length	Solve	Hard	Amazon	Array Binary Search+5
3113. Find the Number of Subarrays Where Boundary Elements Are Maximum	Solve	Hard	-	Array Binary Search+2
3229. Minimum Operations to Make Array Equal to Target	Solve	Hard	-	Array Dynamic Programming+3