Binary Tree Paths LeetCode (All Root to Leaf Path)

Given a binary tree, return all root-to-leaf paths.

For example, given the following binary tree:

   1
 /   \
2     3
 \
  5

All root-to-leaf paths are:

["1->2->5", "1->3"]

This is a popular interview question in LeetCode and GeeksForGeeks

Solution Source: Java