1Count Good Nodes in Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 2Count Good Nodes in Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 3Reverse Odd Levels of Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 4Delete Leaves With a Given ValueMediumTreeDepth-First SearchBinary Tree
Solve → 5Find Bottom Left Tree ValueMediumTreeDepth-First SearchBreadth-First Search
Solve → 6Invert Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 7Maximum Difference Between Node and AncestorMediumTreeDepth-First SearchBinary Tree
Solve → 8Sum of Nodes with Even-Valued GrandparentMediumTreeDepth-First SearchBreadth-First Search
Solve → 9Count Good Nodes in Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 10Merge Two Binary TreesEasyTreeDepth-First SearchBreadth-First Search
Solve → 11Find Largest Value in Each Tree RowMediumTreeDepth-First SearchBreadth-First Search
Solve → 12Reverse Odd Levels of Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 13Find Bottom Left Tree ValueMediumTreeDepth-First SearchBreadth-First Search
Solve → 14Count Good Nodes in Binary TreeMediumTreeDepth-First SearchBreadth-First Search
Solve → 15Delete Leaves With a Given ValueMediumTreeDepth-First SearchBinary Tree
Solve → 16Maximum Difference Between Node and AncestorMediumTreeDepth-First SearchBinary Tree
Solve → 17Invert Binary TreeEasyTreeDepth-First SearchBreadth-First Search
Solve → 18Merge Two Binary TreesEasyTreeDepth-First SearchBreadth-First Search
Solve → 19Sum of Nodes with Even-Valued GrandparentMediumTreeDepth-First SearchBreadth-First Search
Solve → 20Find Largest Value in Each Tree RowMediumTreeDepth-First SearchBreadth-First Search
Solve → 21Binary Tree Level Order TraversalMediumTreeBreadth-First SearchBinary Tree
Solve →