1Binary Tree Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 2Symmetric TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 3Same TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 4Binary Tree Zigzag Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 5Binary Tree Right Side ViewMediumTreeDepth-First SearchBreadth-First Search
Solve → 6Path Sum IIIMediumTreeDepth-First SearchBinary Tree
Solve → 7Diameter of Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 8Same TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 9Binary Tree Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 10Binary Tree Zigzag Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 11Path Sum IIIMediumTreeDepth-First SearchBinary Tree
Solve → 12Balanced Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 13Symmetric TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 14Binary Tree Right Side ViewMediumTreeDepth-First SearchBreadth-First Search
Solve → 15Kth Largest Element in a StreamEasyTreeDesignBinary Search Tree
Solve → 16Invert Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 17Search in a Binary Search TreeEasyTreeBinary Search TreeBinary Tree
Solve → 18Diameter of Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 19Validate Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 20Recover Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 21Insert into a Binary Search TreeMediumTreeBinary Search TreeBinary Tree
Solve → 22Maximum Level Sum of a Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 23Same TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 24Binary Tree Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 25Kth Largest Element in a StreamEasyTreeDesignBinary Search Tree
Solve → 26Balanced Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 27Maximum Depth of Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 28Lowest Common Ancestor of a Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 29Binary Tree Zigzag Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 30Path Sum IIIMediumTreeDepth-First SearchBinary Tree
Solve → 31Symmetric TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 32Invert Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 33Validate Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 34Maximum Width of Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 35Maximum Level Sum of a Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 36Maximum Product of Splitted Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 37Diameter of Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 38Recover Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 39Binary Tree Right Side ViewMediumTreeDepth-First SearchBreadth-First Search
Solve → 40Kth Smallest Element in a BSTMediumTreeDepth-First SearchBinary Search Tree
Solve → 41Delete Node in a BSTMediumTreeBinary Search TreeBinary Tree
Solve → 42Lowest Common Ancestor of a Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 43Subtree of Another TreeEasyTreeDepth-First SearchString Matching
Solve → 44Search in a Binary Search TreeEasyTreeBinary Search TreeBinary Tree
Solve → 45Path SumEasyTreeDepth-First SearchBreadth-First Search
Solve → 46Insert into a Binary Search TreeMediumTreeBinary Search TreeBinary Tree
Solve → 47Sum of Root To Leaf Binary NumbersEasyTreeDepth-First SearchBinary Tree
Solve → 48Sum Root to Leaf NumbersMediumTreeDepth-First SearchBinary Tree
Solve → 49Time Needed to Inform All EmployeesMediumTreeDepth-First SearchBreadth-First Search
Solve → 50Trim a Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 51Count Good Nodes in Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 52Binary Tree Level Order Traversal IIMediumTreeBreadth-First SearchBinary Tree
Solve → 53Find Mode in Binary Search TreeEasyTreeDepth-First SearchBinary Search Tree
Solve → 54Sum of Left LeavesEasyTreeDepth-First SearchBreadth-First Search
Solve → 55Minimum Absolute Difference in BSTEasyTreeDepth-First SearchBreadth-First Search
Solve → 56Same TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 57Diameter of Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 58Invert Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 59Lowest Common Ancestor of a Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 60Symmetric TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 61Binary Tree Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 62Binary Tree Zigzag Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 63Kth Smallest Element in a BSTMediumTreeDepth-First SearchBinary Search Tree
Solve → 64Maximum Depth of Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 65Validate Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 66Binary Tree Right Side ViewMediumTreeDepth-First SearchBreadth-First Search
Solve → 67Balanced Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 68Recover Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 69Kth Largest Element in a StreamEasyTreeDesignBinary Search Tree
Solve → 70Delete Node in a BSTMediumTreeBinary Search TreeBinary Tree
Solve → 71Find Leaves of Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 72Path SumEasyTreeDepth-First SearchBreadth-First Search
Solve → 73Sum Root to Leaf NumbersMediumTreeDepth-First SearchBinary Tree
Solve → 74Path Sum IIIMediumTreeDepth-First SearchBinary Tree
Solve → 75Lowest Common Ancestor of a Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 76Maximum Width of Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 77Minimum Depth of Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 78Minimum Absolute Difference in BSTEasyTreeDepth-First SearchBreadth-First Search
Solve → 79Range Sum of BSTEasyTreeDepth-First SearchBinary Search Tree
Solve → 80Insert into a Binary Search TreeMediumTreeBinary Search TreeBinary Tree
Solve → 81Maximum Number of K-Divisible ComponentsHardTreeDepth-First Search
Solve → 82Root Equals Sum of ChildrenEasyTreeBinary Tree
Solve → 83Subtree of Another TreeEasyTreeDepth-First SearchString Matching
Solve → 84Search in a Binary Search TreeEasyTreeBinary Search TreeBinary Tree
Solve → 85Flip Equivalent Binary TreesMediumTreeDepth-First SearchBinary Tree
Solve → 86Find Mode in Binary Search TreeEasyTreeDepth-First SearchBinary Search Tree
Solve → 87Check Completeness of a Binary TreeMediumTreeBreadth-First SearchBinary Tree
Solve → 88Maximum Level Sum of a Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 89Time Needed to Inform All EmployeesMediumTreeDepth-First SearchBreadth-First Search
Solve → 90Delete Leaves With a Given ValueMediumTreeDepth-First SearchBinary Tree
Solve → 91Reverse Odd Levels of Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 92Sum of Left LeavesEasyTreeDepth-First SearchBreadth-First Search
Solve → 93Leaf-Similar TreesEasyTreeDepth-First SearchBinary Tree
Solve → 94Binary Tree Longest Consecutive SequenceMediumTreeDepth-First SearchBinary Tree
Solve → 95Evaluate Boolean Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 96Merge Two Binary TreesEasyTreeDepth-First SearchBreadth-First Search
Solve → 97Find Largest Value in Each Tree RowMediumTreeDepth-First SearchBreadth-First Search
Solve → 98Cousins in Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 99Average of Levels in Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 100Deepest Leaves SumMediumTreeDepth-First SearchBreadth-First Search
Solve → 101Print Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 102Binary Tree Level Order Traversal IIMediumTreeBreadth-First SearchBinary Tree
Solve → 103Minimum Distance Between BST NodesEasyTreeDepth-First SearchBreadth-First Search
Solve → 104Count Univalue SubtreesMediumTreeDepth-First SearchBinary Tree
Solve → 105Maximize the Number of Target Nodes After Connecting Trees IMediumTreeDepth-First SearchBreadth-First Search
Solve → 106Maximize the Number of Target Nodes After Connecting Trees IIHardTreeDepth-First SearchBreadth-First Search
Solve → 107Count Nodes Equal to Average of SubtreeMediumTreeDepth-First SearchBinary Tree
Solve → 108Find Bottom Left Tree ValueMediumTreeDepth-First SearchBreadth-First Search
Solve → 109Distribute Coins in Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 110Count Good Nodes in Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 111N-ary Tree Level Order TraversalMediumTreeBreadth-First Search
Solve → 112Number of Good Leaf Nodes PairsMediumTreeDepth-First SearchBinary Tree
Solve → 113Binary Tree Coloring GameMediumTreeDepth-First SearchBinary Tree
Solve → 114Boundary of Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 115Minimum Fuel Cost to Report to the CapitalMediumTreeDepth-First SearchBreadth-First Search
Solve → 116Find Minimum Diameter After Merging Two TreesHardTreeDepth-First SearchBreadth-First Search
Solve → 117K-th Largest Perfect Subtree Size in Binary TreeMediumTreeDepth-First SearchSorting
Solve → 118Minimum Number of Operations to Sort a Binary Tree by LevelMediumTreeBreadth-First SearchBinary Tree
Solve → 119Convert BST to Greater TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 120Univalued Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 121Inorder Successor in BSTMediumTreeDepth-First SearchBinary Search Tree
Solve → 122Maximum Product of Splitted Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 123Frog Position After T SecondsHardTreeDepth-First SearchBreadth-First Search
Solve → 124Add One Row to TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 125Validate Binary Tree NodesMediumTreeDepth-First SearchBreadth-First Search
Solve → 126Binary Tree Longest Consecutive Sequence IIMediumTreeDepth-First SearchBinary Tree
Solve → 127Longest Univalue PathMediumTreeDepth-First SearchBinary Tree
Solve → 128Extract Kth Character From The Rope TreeEasyTreeDepth-First SearchBinary Tree
Solve → 129Complete Binary Tree InserterMediumTreeBreadth-First SearchDesign
Solve → 130Tree DiameterMediumTreeDepth-First SearchBreadth-First Search
Solve → 131Move Sub-Tree of N-Ary TreeHardTreeDepth-First Search
Solve → 132Find Nearest Right Node in Binary TreeMediumTreeBreadth-First SearchBinary Tree
Solve → 133Change the Root of a Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 134Kth Largest Sum in a Binary TreeMediumTreeBreadth-First SearchSorting
Solve → 135Binary Search Tree to Greater Sum TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 136Inorder Successor in BST IIMediumTreeBinary Search TreeBinary Tree
Solve → 137Binary Tree Upside DownMediumTreeDepth-First SearchBinary Tree
Solve → 138Trim a Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 139Same TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 140Diameter of Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 141Binary Tree Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 142Invert Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 143Lowest Common Ancestor of a Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 144Kth Smallest Element in a BSTMediumTreeDepth-First SearchBinary Search Tree
Solve → 145Symmetric TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 146Binary Tree Zigzag Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve → 147Maximum Depth of Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 148Validate Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 149Balanced Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 150Kth Largest Element in a StreamEasyTreeDesignBinary Search Tree
Solve → 151Binary Tree Right Side ViewMediumTreeDepth-First SearchBreadth-First Search
Solve → 152Recover Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 153Delete Node in a BSTMediumTreeBinary Search TreeBinary Tree
Solve → 154Path Sum IIIMediumTreeDepth-First SearchBinary Tree
Solve → 155Minimum Absolute Difference in BSTEasyTreeDepth-First SearchBreadth-First Search
Solve → 156Maximum Level Sum of a Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 157Maximum Width of Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 158Maximum Number of K-Divisible ComponentsHardTreeDepth-First Search
Solve → 159Path SumEasyTreeDepth-First SearchBreadth-First Search
Solve → 160Lowest Common Ancestor of a Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 161Find Leaves of Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 162Find Mode in Binary Search TreeEasyTreeDepth-First SearchBinary Search Tree
Solve → 163Sum Root to Leaf NumbersMediumTreeDepth-First SearchBinary Tree
Solve → 164Time Needed to Inform All EmployeesMediumTreeDepth-First SearchBreadth-First Search
Solve → 165Flip Equivalent Binary TreesMediumTreeDepth-First SearchBinary Tree
Solve → 166Binary Tree Longest Consecutive SequenceMediumTreeDepth-First SearchBinary Tree
Solve → 167Evaluate Boolean Binary TreeEasyTreeDepth-First SearchBinary Tree
Solve → 168Insert into a Binary Search TreeMediumTreeBinary Search TreeBinary Tree
Solve → 169Minimum Distance Between BST NodesEasyTreeDepth-First SearchBreadth-First Search
Solve → 170Deepest Leaves SumMediumTreeDepth-First SearchBreadth-First Search
Solve → 171Minimum Depth of Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 172Boundary of Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 173Subtree of Another TreeEasyTreeDepth-First SearchString Matching
Solve → 174Binary Tree Coloring GameMediumTreeDepth-First SearchBinary Tree
Solve → 175Number of Good Leaf Nodes PairsMediumTreeDepth-First SearchBinary Tree
Solve → 176Search in a Binary Search TreeEasyTreeBinary Search TreeBinary Tree
Solve → 177Distribute Coins in Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 178Binary Tree Longest Consecutive Sequence IIMediumTreeDepth-First SearchBinary Tree
Solve → 179Longest Univalue PathMediumTreeDepth-First SearchBinary Tree
Solve → 180Complete Binary Tree InserterMediumTreeBreadth-First SearchDesign
Solve → 181Tree DiameterMediumTreeDepth-First SearchBreadth-First Search
Solve → 182Move Sub-Tree of N-Ary TreeHardTreeDepth-First Search
Solve → 183Find Nearest Right Node in Binary TreeMediumTreeBreadth-First SearchBinary Tree
Solve → 184Change the Root of a Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 185Extract Kth Character From The Rope TreeEasyTreeDepth-First SearchBinary Tree
Solve → 186Range Sum of BSTEasyTreeDepth-First SearchBinary Search Tree
Solve → 187Frog Position After T SecondsHardTreeDepth-First SearchBreadth-First Search
Solve → 188Root Equals Sum of ChildrenEasyTreeBinary Tree
Solve → 189Maximum Product of Splitted Binary TreeMediumTreeDepth-First SearchBinary Tree
Solve → 190Sum of Left LeavesEasyTreeDepth-First SearchBreadth-First Search
Solve → 191Check Completeness of a Binary TreeMediumTreeBreadth-First SearchBinary Tree
Solve → 192Binary Tree Level Order Traversal IIMediumTreeBreadth-First SearchBinary Tree
Solve → 193Find Largest Value in Each Tree RowMediumTreeDepth-First SearchBreadth-First Search
Solve → 194Delete Leaves With a Given ValueMediumTreeDepth-First SearchBinary Tree
Solve → 195Reverse Odd Levels of Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 196Leaf-Similar TreesEasyTreeDepth-First SearchBinary Tree
Solve → 197Merge Two Binary TreesEasyTreeDepth-First SearchBreadth-First Search
Solve → 198Print Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 199Count Good Nodes in Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 200Cousins in Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 201Average of Levels in Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 202Count Nodes Equal to Average of SubtreeMediumTreeDepth-First SearchBinary Tree
Solve → 203N-ary Tree Level Order TraversalMediumTreeBreadth-First Search
Solve → 204Find Minimum Diameter After Merging Two TreesHardTreeDepth-First SearchBreadth-First Search
Solve → 205Count Univalue SubtreesMediumTreeDepth-First SearchBinary Tree
Solve → 206Univalued Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 207Maximize the Number of Target Nodes After Connecting Trees IMediumTreeDepth-First SearchBreadth-First Search
Solve → 208Maximize the Number of Target Nodes After Connecting Trees IIHardTreeDepth-First SearchBreadth-First Search
Solve → 209Trim a Binary Search TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 210Sum of Root To Leaf Binary NumbersEasyTreeDepth-First SearchBinary Tree
Solve → 211Find Bottom Left Tree ValueMediumTreeDepth-First SearchBreadth-First Search
Solve → 212K-th Largest Perfect Subtree Size in Binary TreeMediumTreeDepth-First SearchSorting
Solve → 213Binary Search Tree to Greater Sum TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 214Minimum Number of Operations to Sort a Binary Tree by LevelMediumTreeBreadth-First SearchBinary Tree
Solve → 215Convert BST to Greater TreeMediumTreeDepth-First SearchBinary Search Tree
Solve → 216Minimum Fuel Cost to Report to the CapitalMediumTreeDepth-First SearchBreadth-First Search
Solve → 217Inorder Successor in BSTMediumTreeDepth-First SearchBinary Search Tree
Solve → 218Add One Row to TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 219Validate Binary Tree NodesMediumTreeDepth-First SearchBreadth-First Search
Solve → 220Kth Largest Sum in a Binary TreeMediumTreeBreadth-First SearchSorting
Solve → 221Inorder Successor in BST IIMediumTreeBinary Search TreeBinary Tree
Solve → 222Binary Tree Upside DownMediumTreeDepth-First SearchBinary Tree
Solve →