Connect nodes at the same level in a binary tree

May 16, 2016 

Connect nodes at the same level in a binary tree  

http://www.geeksforgeeks.org/connect-nodes-at-same-level/   (? bug)

better one:
http://javabypatel.blogspot.ca/2015/08/connect-nodes-at-same-level-in-binary-tree-using-constant-extra-space.html

Using Queue - 
http://javabypatel.blogspot.ca/2015/08/connect-nodes-at-same-level-in-binary-tree.html

Question and answer:

1. How long do you study the problem? What do you learn? 

Julia spent more than 1 hour to study the blogs above. She will write down her own notes about the test case, analysis and solution, and post them in the blog. Encourage herself to write, to share and to improve her confidence on problem solving. 

Will come back soon.