LeetCode 126. Word Ladder II
To solve the problem, we can use a combination of BFS and backtracking.
To solve the problem, we can use a combination of BFS and backtracking.
To merge k sorted linked lists efficiently, we can use a Min Heap data structure.
To find the maximum path sum in a binary tree, we can use a recursive approach. The idea is to traverse the tree in a bottom-up manner and calculate the maximum path sum for each node.