Depth-First Search
77 problems
- 99.Recover Binary Search TreeMedium
- 100.Same TreeEasy
- 110.Balanced Binary TreeEasy
- 111.Minimum Depth of Binary TreeEasy
- 112.Path SumEasy
- 113.Path Sum IIMedium
- 114.Flatten Binary Tree to Linked ListMedium
- 144.Binary Tree Preorder TraversalEasy
- 145.Binary Tree Postorder TraversalEasy
- 210.Course Schedule IIMedium
- 222.Count Complete Tree NodesMedium
- 230.Kth Smallest Element in a BSTMedium
- 236.Lowest Common Ancestor of a Binary TreeMedium
- 257.Binary Tree PathsEasy
- 310.Minimum Height TreesUnknown
- 329.Longest Increasing Path in a MatrixHard
- 386.Lexicographical NumbersMedium
- 417.Pacific Atlantic Water FlowMedium
- 508.Most Frequent Subtree SumMedium
- 513.Find Bottom Left Tree ValueMedium
- 515.Find Largest Value in Each Tree RowMedium
- 590.N-ary Tree Postorder TraversalEasy
- 684.Redundant ConnectionMedium
- 778.Swim in Rising WaterHard
- 802.Find Eventual Safe StatesMedium
- 827.Making A Large IslandHard
- 834.Sum of Distances in TreeUnknown
- 839.Similar String GroupsHard
- 851.Loud and RichMedium
- 865.Smallest Subtree with all the Deepest NodesMedium
- 928.Minimize Malware Spread IIUnknown
- 947.Most Stones Removed with Same Row or ColumnMedium
- 951.Flip Equivalent Binary TreesMedium
- 959.Regions Cut By SlashesUnknown
- 965.Univalued Binary TreeEasy
- 1022.Sum of Root To Leaf Binary NumbersEasy
- 1028.Recover a Tree From Preorder TraversalHard
- 1038.Binary Search Tree to Greater Sum TreeMedium
- 1080.Insufficient Nodes in Root to Leaf PathsMedium
- 1110.Delete Nodes And Return ForestMedium
- 1123.Lowest Common Ancestor of Deepest LeavesMedium
- 1161.Maximum Level Sum of a Binary TreeMedium
- 1233.Remove Sub-Folders from the FilesystemMedium
- 1261.Find Elements in a Contaminated Binary TreeMedium
- 1305.All Elements in Two Binary Search TreesUnknown
- 1319.Number of Operations to Make Network ConnectedMedium
- 1339.Maximum Product of Splitted Binary TreeMedium
- 1367.Linked List in Binary TreeMedium
- 1462.Course Schedule IVMedium
- 1530.Number of Good Leaf Nodes PairsMedium
- 1568.Minimum Number of Days to Disconnect IslandUnknown
- 1766.Tree of CoprimesUnknown
- 1905.Count Sub IslandsUnknown
- 1938.Maximum Genetic Difference QueryUnknown
- 1948.Delete Duplicate Folders in SystemUnknown
- 1970.Last Day Where You Can Still CrossUnknown
- 1971.Find if Path Exists in GraphEasy
- 2092.Find All People With SecretUnknown
- 2096.Step-By-Step Directions From a Binary Tree Node to AnotherMedium
- 2097.Valid Arrangement of PairsUnknown
- 2127.Maximum Employees to Be Invited to a MeetingUnknown
- 2192.All Ancestors of a Node in a Directed Acyclic GraphMedium
- 2322.Minimum Score After Removals on a TreeUnknown
- 2331.Evaluate Boolean Binary TreeEasy
- 2415.Reverse Odd Levels of Binary TreeMedium
- 2440.Create Components With Same ValueMedium
- 2458.Height of Binary Tree After Subtree Removal QueriesUnknown
- 2467.Most Profitable Path in a TreeMedium
- 2641.Cousins in Binary Tree IIMedium
- 2658.Maximum Number of Fish in a GridMedium
- 2685.Count the Number of Complete ComponentsMedium
- 2872.Maximum Number of K-Divisible ComponentsUnknown
- 3068.Find the Maximum Sum of Node ValuesHard
- 3203.Find Minimum Diameter After Merging Two TreesMedium
- 3310.Remove Methods From ProjectUnknown
- 3372.Maximize the Number of Target Nodes After Connecting Trees IMedium
- 3373.Maximize the Number of Target Nodes After Connecting Trees IIUnknown