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241 problems total

Array (1905)Sorting (440)Depth First Search (316)Database (301)Breadth First Search (241)Tree (240)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)
All Topics(4301)Algorithms(3944)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)

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TitleDifficultyVideosCompanies
Apply Substitutionsmedium-
Brace Expansionmedium-
Find if there is a path between two vertices in a directed grapheasy-
googlefacebookamazon
Implement Hierarchical Locking System for Tree Structuresmedium-
Maximize Amount After Two Days of Conversionsmedium-
Minimize the Maximum Edge Weight of Graphmedium-
Minimum Cost to Make at Least One Valid Path in a Gridhard-
google
Minimum Runes to Add to Cast Spellhard-
Path With Minimum Effortmedium-
Properties Graphmedium-
Rotting Orangesmedium-
Smallest String With Swapsmedium-
Unit Conversion Imedium-
Unit Conversion IImedium-
Same Treeeasy
amazonapplebloomberg
Symmetric Binary Treeeasy-
adobealibabaamazon
Binary Tree Level Order Traversal - Level by Levelmedium
adobeamazonapple
Binary Tree Traversal - Zigzag Level Order Traversalmedium-
amazonapplebloomberg
Maximum Depth of Binary Treeeasy
adobeamazonapple
Binary Tree Traversal - Level Order Bottom upmedium-
adobeamazonapple
Minimum Depth of Binary Treeeasy-
amazonapplefacebook
Path Sum 1 - Check if root to leaf path existseasy-
adobeamazonapple
Populate next pointer to right node in Perfect Binary Treemedium-
amazonapplebloomberg
Populate next pointer to right node in Binary Treemedium-
amazonbloombergfacebook
Word Ladder 2 - Get all the laddershard-
amazonapplebloomberg
Word Ladder 1 - Get Ladder Lengthhard-
affirmamazonapple
Surrounded Regionsmedium-
amazonebayfacebook
Clone Undirected Graphmedium
amazonapplefacebook
Binary Tree Right Side Viewmedium-
adobeamazonapple
Number of Islandsmedium
adobeaffirmalibaba
Course Schedule 1 - Is it Possiblemedium
amazonapplebloomberg
Course Schedule 2 - Get Ordered Coursesmedium-
airbnbamazonapple
Invert Binary Treeeasy
amazonapplebloomberg
Graph Valid Treemedium-
amazonfacebookgoogle
Alien Dictionaryhard-
airbnbamazonapple
Least Number of Perfect Squares that Sums to nmedium-
adobeamazonapple
Walls and Gatesmedium-
amazonapplebloomberg
Serialize and Deserialize Binary Treehard
amazonapplebloomberg
Remove Invalid Parentheses Problemhard-
amazonapplebloomberg
Smallest Rectangle Enclosing Black Pixelshard-
google
Minimum Height Treesmedium-
amazonapplebloomberg
Binary Tree Traversal - Vertical Order Traversalmedium-
adobeamazonbloomberg
Shortest Distance from All Buildingshard-
amazonbytedancefacebook
Coin Change with Fewest Number of Coins Given Infinite Supplymedium
adobeaffirmairbnb
Number of Connected Components in an Undirected Graphmedium-
amazonfacebookgoogle
Longest Increasing Path in a Matrixhard-
adobeamazonapple
Nested List Weight Summedium-
amazonclouderafacebook
Nested List Weight Sum 2medium-
didifacebooklinkedin
Water and Jugmedium-
amazongooglelyft
Evaluate Divisionmedium-
adobeamazonbloomberg
Showing 1 to 50 of 241 results
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