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Problems

39 problems

Has videoPremium onlyReset
Array447String249Hash Table190Math173Database113Sorting100Simulation93Counting70Two Pointers70Bit Manipulation54Greedy51Matrix41Tree40Depth-First Search39Binary Tree37All topics

Easy · 39 results

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TitleSolutionAcceptDifficultyTopics
94. Binary Tree Inorder TraversalVideo
Solution80.4%Easy
Binary Tree, Depth-First Search +2· 7 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
104. Maximum Depth of Binary TreeVideo
Solution78.6%Easy
Binary Tree, Breadth-First Search +2· 17 companies
110. Balanced Binary TreeVideo
Solution59.2%Easy
Binary Tree, Depth-First Search +1· 9 companies
111. Minimum Depth of Binary TreeVideo
Solution53.7%Easy
Binary Tree, Breadth-First Search +2· 7 companies
112. Path SumVideo
Solution55.8%Easy
Binary Tree, Breadth-First Search +2· 9 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
226. Invert Binary TreeVideo
Solution80.5%Easy
Binary Tree, Breadth-First Search +2· 9 companies
257. Binary Tree PathsVideo
Solution69.5%Easy
Backtracking, Binary Tree +3· 8 companies
270. Closest Binary Search Tree ValueVideoPremium
Solution49.2%Easy
Binary Search, Binary Search Tree +3· 7 companies
404. Sum of Left LeavesVideo
Solution63.1%Easy
Binary Tree, Breadth-First Search +2· 6 companies
463. Island PerimeterVideo
Solution74.3%Easy
Array, Breadth-First Search +2· 9 companies
501. Find Mode in Binary Search TreeVideo
Solution59.2%Easy
Binary Search Tree, Binary Tree +2· 4 companies
530. Minimum Absolute Difference in BSTVideo
Solution59.3%Easy
Binary Search Tree, Binary Tree +3· 3 companies
543. Diameter of Binary TreeVideo
Solution66.4%Easy
Binary Tree, Depth-First Search +1· 20 companies
559. Maximum Depth of N-ary TreeVideo
Solution73.5%Easy
Breadth-First Search, Depth-First Search +1· 2 companies
563. Binary Tree TiltVideo
Solution66.2%Easy
Binary Tree, Depth-First Search +1· 3 companies
572. Subtree of Another TreeVideo
Solution52.0%Easy
Binary Tree, Depth-First Search +3· 8 companies
589. N-ary Tree Preorder TraversalVideo
Solution76.7%Easy
Depth-First Search, Stack +1· 2 companies
590. N-ary Tree Postorder TraversalVideo
Solution81.0%Easy
Depth-First Search, Stack +1· 3 companies
617. Merge Two Binary TreesVideo
Solution79.2%Easy
Binary Tree, Breadth-First Search +2· 8 companies
637. Average of Levels in Binary TreeVideo
Solution74.8%Easy
Binary Tree, Breadth-First Search +2· 4 companies
653. Two Sum IV - Input is a BSTVideo
Solution63.7%Easy
Binary Search Tree, Binary Tree +5· 8 companies
671. Second Minimum Node In a Binary TreeVideo
Solution46.0%Easy
Binary Tree, Depth-First Search +1· 2 companies
733. Flood FillVideo
Solution68.6%Easy
Array, Breadth-First Search +2· 12 companies
783. Minimum Distance Between BST NodesVideo
Solution61.8%Easy
Binary Search Tree, Binary Tree +3· 4 companies
872. Leaf-Similar TreesVideo
Solution70.0%Easy
Binary Tree, Depth-First Search +1· 5 companies
897. Increasing Order Search TreeVideo
Solution79.1%Easy
Binary Search Tree, Binary Tree +3· 2 companies
938. Range Sum of BSTVideo
Solution87.7%Easy
Binary Search Tree, Binary Tree +2· 6 companies
965. Univalued Binary TreeVideo
Solution73.5%Easy
Binary Tree, Breadth-First Search +2· 3 companies
993. Cousins in Binary TreeVideo
Solution59.8%Easy
Binary Tree, Breadth-First Search +2· 6 companies
1022. Sum of Root To Leaf Binary NumbersVideo
Solution76.6%Easy
Binary Tree, Depth-First Search +1· 6 companies
1379. Find a Corresponding Node of a Binary Tree in a Clone of That TreeVideo
Solution85.9%Easy
Binary Tree, Breadth-First Search +2· 1 company
1469. Find All The Lonely NodesVideoPremium
Solution83.8%Easy
Binary Tree, Breadth-First Search +2· 1 company
1971. Find if Path Exists in GraphVideo
Solution55.5%Easy
Breadth-First Search, Depth-First Search +2· 5 companies
2331. Evaluate Boolean Binary TreeVideo
Solution82.7%Easy
Binary Tree, Depth-First Search +1· 1 company
2689. Extract Kth Character From The Rope TreeVideoPremium
Solution73.4%Easy
Binary Tree, Depth-First Search +1· 1 company
Showing 1–39 of 39