Consider all the leaves of a binary tree. From left to right order, the values of those leaves form a leaf value sequence.
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733. Flood Fill
Easy
An image is represented by a 2-D array of integers, each integer representing the pixel value of the image (from 0 to 65535).
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110. Balanced Binary Tree
Easy
Description
Given a binary tree, determine if it is height-balanced.
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437. Path Sum III
You are given a binary tree in which each node contains an integer value.
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257. Binary Tree Paths
Easy
Given a binary tree, return all root-to-leaf paths.
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113. Path Sum II
Medium
Given a binary tree and a sum, find all root-to-leaf paths where each path’s sum equals the given sum.
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