2Sum N-ary Trees

Two people from different teams will work together on a project that requires a total of T hours. Each team is represented as an N-ary tree where a tree node is a team member and the number of hour(s) the member can devote to the project.
Find out all the unique combinations of hours that both people's work [t1, t2] add up to T hours...

Get one-to-one training from Google Facebook engineers

Top-notch Professionals

Learn from Facebook and Google senior engineers interviewed 100+ candidates.
Most recent interview questions and system design topics gathered from aonecode alumnus.
One-to-one online classes. Get feedbacks from real interviewers.

Customized Private Class

Already a coding expert? - Advance straight to hard interview topics of your interest.
New to the ground? - Develop basic coding skills with your own designated mentor.
Days before interview? - Focus on most important problems in target company question bank.