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Striver’s SDE Sheet

SDE Sheet contains very handily crafted and picked top coding interview questions from different topics of Data Structures & Algorithms. These questions are one of the most asked coding interview questions in coding interviews of companies like Google, Amazon, Microsoft, Facebook, Swiggy, Flipkart, etc, and cover almost all of the concepts related to Data Structure & Algorithms.

By Azhar Khan122 problems35 Easy69 Medium18 Hard5 followersUpdated 28 May 2025

Start: Set Matrix Zeroes

122problems

35Easy

69Medium

18Hard

Signed in, the sheet shows which of these you have solved.

Showing 35 of 122 problems · Easy · Clear

TitleSolutionAcceptDifficultyTopics

118. Pascal's TriangleVideo

Solution79.4%Easy

Array, Dynamic Programming· 17 companies

121. Best Time to Buy and Sell StockVideo

Solution57.1%Easy

Array, Dynamic Programming· 92 companies

88. Merge Sorted ArrayVideo

Solution55.7%Easy

Array, Sorting +1· 37 companies

169. Majority ElementVideo

Solution66.2%Easy

Array, Counting +3· 22 companies

1. Two SumVideo

Solution57.8%Easy

Array, Hash Table· 127 companies

206. Reverse Linked ListVideo

Solution81.0%Easy

Linked List, Recursion· 34 companies

876. Middle of the Linked ListVideo

Solution82.3%Easy

Linked List, Two Pointers· 13 companies

21. Merge Two Sorted ListsVideo

Solution68.7%Easy

Linked List, Recursion· 36 companies

160. Intersection of Two Linked ListsVideo

Solution64.6%Easy

Hash Table, Linked List +1· 13 companies

141. Linked List CycleVideo

Solution55.2%Easy

Hash Table, Linked List +1· 24 companies

234. Palindrome Linked ListVideo

Solution58.8%Easy

Linked List, Recursion +2· 17 companies

26. Remove Duplicates from Sorted ArrayVideo

Solution63.7%Easy

Array, Two Pointers· 26 companies

485. Max Consecutive OnesVideo

Solution66.0%Easy

Array· 14 companies

455. Assign CookiesVideo

Solution55.4%Easy

Array, Greedy +2· 9 companies

225. Implement Stack using QueuesVideo

Solution70.1%Easy

Design, Queue +1· 9 companies

232. Implement Queue using StacksVideo

Solution70.2%Easy

Design, Queue +1· 12 companies

20. Valid ParenthesesVideo

Solution45.2%Easy

Stack, String· 113 companies

496. Next Greater Element IVideo

Solution76.5%Easy

Array, Hash Table +2· 17 companies

13. Roman to IntegerVideo

Solution67.0%Easy

Hash Table, Math +1· 36 companies

14. Longest Common PrefixVideo

Solution48.6%Easy

String, Trie· 60 companies

28. Find the Index of the First Occurrence in a StringVideo

Solution47.0%Easy

String, String Matching +1· 16 companies

242. Valid AnagramVideo

Solution68.5%Easy

Hash Table, Sorting +1· 40 companies

94. Binary Tree Inorder TraversalVideo

Solution80.4%Easy

Binary Tree, Depth-First Search +2· 7 companies

144. Binary Tree Preorder TraversalVideo

Solution76.6%Easy

Binary Tree, Depth-First Search +2· 5 companies

145. Binary Tree Postorder TraversalVideo

Solution79.0%Easy

Binary Tree, Depth-First Search +2· 5 companies

104. Maximum Depth of Binary TreeVideo

Solution78.6%Easy

Binary Tree, Breadth-First Search +2· 17 companies

543. Diameter of Binary TreeVideo

Solution66.4%Easy

Binary Tree, Depth-First Search +1· 20 companies

110. Balanced Binary TreeVideo

Solution59.2%Easy

Binary Tree, Depth-First Search +1· 9 companies

100. Same TreeVideo

Solution68.0%Easy

Binary Tree, Breadth-First Search +2· 9 companies

101. Symmetric TreeVideo

Solution62.1%Easy

Binary Tree, Breadth-First Search +2· 11 companies

700. Search in a Binary Search TreeVideo

Solution83.1%Easy

Binary Search Tree, Binary Tree +1· 5 companies

108. Convert Sorted Array to Binary Search TreeVideo

Solution75.9%Easy

Array, Binary Search Tree +3· 9 companies

653. Two Sum IV - Input is a BSTVideo

Solution63.7%Easy

Binary Search Tree, Binary Tree +5· 8 companies

703. Kth Largest Element in a StreamVideo

Solution61.4%Easy

Binary Search Tree, Binary Tree +4· 11 companies

733. Flood FillVideo

Solution68.6%Easy

Array, Breadth-First Search +2· 12 companies

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