8 docs tagged with "Recursion"

Determine if a given binary tree is height-balanced, meaning the heights of the two subtrees of every node never differ by more than one.

Given the root of a binary tree, return the values of its nodes level by level, from left to right.

You need to find the number of distinct ways to climb a staircase with `n` steps, given that you can take either 1 or 2 steps at a time.

Given a 2D grid representing an image, a starting pixel's coordinates, and a new color, change the color of the starting pixel and all…

Given the root of a binary tree, invert the tree by swapping its left and right children at each node.

Find all possible arrangements of distinct integers in an array.

Given the head of a singly linked list, reverse the list and return the head of the reversed list.

Determine if a given binary tree is a valid binary search tree (BST).