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DSA Sheets
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Companies
Apple
Depth First Search
Depth First Search
0/23 solved
Number of Islands
MEDIUM
Validate Binary Search Tree
MEDIUM
Binary Tree Maximum Path Sum
HARD
Lowest Common Ancestor of a Binary Tree
MEDIUM
Symmetric Tree
EASY
Binary Tree Inorder Traversal
EASY
Same Tree
EASY
Cheapest Flights Within K Stops
MEDIUM
Path Sum
EASY
Clone Graph
MEDIUM
Evaluate Division
MEDIUM
Merge Two Binary Trees
EASY
Recover Binary Search Tree
MEDIUM
Vertical Order Traversal of a Binary Tree
HARD
Binary Tree Paths
EASY
Trim a Binary Search Tree
MEDIUM
Sum of Left Leaves
EASY
Number of Operations to Make Network Connected
MEDIUM
Flatten Nested List Iterator
MEDIUM
Possible Bipartition
MEDIUM
Increasing Order Search Tree
EASY
Number of Connected Components in an Undirected Graph
MEDIUM
Serialize and Deserialize N-ary Tree
HARD