80 docs tagged with "depth-first-search"

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All Nodes Distance K in Binary Tree

LeetCode 893 | Difficulty: Medium

Average of Levels in Binary Tree

LeetCode 637 | Difficulty: Easy

Balanced Binary Tree

LeetCode 110 | Difficulty: Easy

Battleships in a Board

LeetCode 419 | Difficulty: Medium

Binary Tree Cameras

LeetCode 1008 | Difficulty: Hard

Binary Tree Inorder Traversal

LeetCode 94 | Difficulty: Easy

Binary Tree Longest Consecutive Sequence

LeetCode 298 | Difficulty: Medium

Binary Tree Paths

LeetCode 257 | Difficulty: Easy

Binary Tree Postorder Traversal

LeetCode 145 | Difficulty: Easy

Binary Tree Preorder Traversal

LeetCode 144 | Difficulty: Easy

Binary Tree Right Side View

LeetCode 199 | Difficulty: Medium

Binary Tree Tilt

LeetCode 563 | Difficulty: Easy

Binary Tree Vertical Order Traversal

LeetCode 314 | Difficulty: Medium

Boundary of Binary Tree

LeetCode 545 | Difficulty: Medium

Clone Graph

LeetCode 133 | Difficulty: Medium

Closest Binary Search Tree Value

LeetCode 270 | Difficulty: Easy

Convert Binary Search Tree to Sorted Doubly Linked List

LeetCode 758 | Difficulty: Medium

Correct a Binary Tree

LeetCode 1796 | Difficulty: Medium

Count Good Nodes in Binary Tree

LeetCode 1544 | Difficulty: Medium

Count Sub Islands

LeetCode 2035 | Difficulty: Medium

Count Univalue Subtrees

LeetCode 250 | Difficulty: Medium

Course Schedule

LeetCode 207 | Difficulty: Medium

Course Schedule II

LeetCode 210 | Difficulty: Medium

Cousins in Binary Tree

LeetCode 1035 | Difficulty: Easy

Deepest Leaves Sum

LeetCode 1254 | Difficulty: Medium

Diameter of Binary Tree

LeetCode 543 | Difficulty: Easy

Distribute Coins in Binary Tree

LeetCode 1021 | Difficulty: Medium

Find All The Lonely Nodes

LeetCode 1609 | Difficulty: Easy

Find Bottom Left Tree Value

LeetCode 513 | Difficulty: Medium

Find if Path Exists in Graph

LeetCode 2121 | Difficulty: Easy

Find Largest Value in Each Tree Row

LeetCode 515 | Difficulty: Medium

Find Leaves of Binary Tree

LeetCode 366 | Difficulty: Medium

Flatten Binary Tree to Linked List

LeetCode 114 | Difficulty: Medium

Flood Fill

LeetCode 733 | Difficulty: Easy

Graph Valid Tree

LeetCode 261 | Difficulty: Medium

House Robber III

LeetCode 337 | Difficulty: Medium

Inorder Successor in BST

LeetCode 285 | Difficulty: Medium

Invert Binary Tree

LeetCode 226 | Difficulty: Easy

Island Perimeter

LeetCode 463 | Difficulty: Easy

Jump Game III

LeetCode 1428 | Difficulty: Medium

Keys and Rooms

LeetCode 871 | Difficulty: Medium

Kth Smallest Element in a BST

LeetCode 230 | Difficulty: Medium

Longest Increasing Path in a Matrix

LeetCode 329 | Difficulty: Hard

Lowest Common Ancestor of a Binary Search Tree

LeetCode 235 | Difficulty: Medium

Lowest Common Ancestor of a Binary Tree

LeetCode 236 | Difficulty: Medium

Max Area of Island

LeetCode 695 | Difficulty: Medium

Maximum Depth of Binary Tree

LeetCode 104 | Difficulty: Easy

Maximum Depth of N-ary Tree

LeetCode 774 | Difficulty: Easy

Merge Two Binary Trees

LeetCode 617 | Difficulty: Easy

Minimum Absolute Difference in BST

LeetCode 530 | Difficulty: Easy

Minimum Depth of Binary Tree

LeetCode 111 | Difficulty: Easy

Minimum Distance Between BST Nodes

LeetCode 799 | Difficulty: Easy

N-ary Tree Postorder Traversal

LeetCode 776 | Difficulty: Easy

N-ary Tree Preorder Traversal

LeetCode 775 | Difficulty: Easy

Number of Closed Islands

LeetCode 1380 | Difficulty: Medium

Number of Connected Components in an Undirected Graph

LeetCode 323 | Difficulty: Medium

Number of Distinct Islands

LeetCode 694 | Difficulty: Medium

Number of Provinces

LeetCode 547 | Difficulty: Medium

Path Sum

LeetCode 112 | Difficulty: Easy

Path Sum II

LeetCode 113 | Difficulty: Medium

Populating Next Right Pointers in Each Node

LeetCode 116 | Difficulty: Medium

Populating Next Right Pointers in Each Node II

LeetCode 117 | Difficulty: Medium

Range Sum of BST

LeetCode 975 | Difficulty: Easy

Reconstruct Itinerary

LeetCode 332 | Difficulty: Hard

Same Tree

LeetCode 100 | Difficulty: Easy

Second Minimum Node In a Binary Tree

LeetCode 671 | Difficulty: Easy

Serialize and Deserialize Binary Tree

LeetCode 297 | Difficulty: Hard

Serialize and Deserialize BST

LeetCode 449 | Difficulty: Medium

Serialize and Deserialize N-ary Tree

LeetCode 765 | Difficulty: Hard

Smallest String Starting From Leaf

LeetCode 1030 | Difficulty: Medium

Subtree of Another Tree

LeetCode 572 | Difficulty: Easy

Sum of Distances in Tree

LeetCode 863 | Difficulty: Hard

Sum Root to Leaf Numbers

LeetCode 129 | Difficulty: Medium

Symmetric Tree

LeetCode 101 | Difficulty: Easy

The Maze

LeetCode 490 | Difficulty: Medium

Two Sum BSTs

LeetCode 1150 | Difficulty: Medium

Univalued Binary Tree

LeetCode 1005 | Difficulty: Easy

Validate Binary Search Tree

LeetCode 98 | Difficulty: Medium

Vertical Order Traversal of a Binary Tree

LeetCode 1029 | Difficulty: Hard

Word Search

LeetCode 79 | Difficulty: Medium