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Doordash
Depth First Search
Depth First Search
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Number of Islands
MEDIUM
Binary Tree Maximum Path Sum
HARD
Course Schedule II
MEDIUM
Serialize and Deserialize Binary Tree
HARD
Max Area of Island
MEDIUM
Number of Provinces
MEDIUM
Longest Increasing Path in a Matrix
HARD
Vertical Order Traversal of a Binary Tree
HARD
Design Add and Search Words Data Structure
MEDIUM
Number of Closed Islands
MEDIUM
Making A Large Island
HARD
Swim in Rising Water
HARD
Binary Tree Vertical Order Traversal
MEDIUM
Count Sub Islands
MEDIUM
Path With Maximum Minimum Value
MEDIUM
Count Nodes With the Highest Score
MEDIUM
Minimize Malware Spread
HARD
Diameter of N-Ary Tree
MEDIUM