1004 
Max Consecutive Ones III 
Medium 
Two Pointers

Sliding Window

1007 
Minimum Domino Rotations For Equal Row 
Medium 

1008 
Construct Binary Search Tree from Preorder Traversal 
Medium 
Tree

1019 
Next Greater Node In Linked List 
Medium 
Linked List 
Stack

1022 
Sum of Root To Leaf Binary Numbers 
Easy 
Tree

1026 
Maximum Difference Between Node and Ancestor 
Medium 
Tree

Depthfirst Search

1028 
Recover a Tree From Preorder Traversal 
Hard 
Tree

Depthfirst Search

1042 
Flower Planting With No Adjacent 
Medium 

1043 
Partition Array for Maximum Sum 
Medium 
DP 
Graph

1059 
All Paths from Source Lead to Destination 
Medium 
