Python Solution with only 1 loop

Can this be solved using recursion?

Solution with one while loop using JAVA

design guru code compiler is terrible

I understand the space is O(n), with the use of the queue and list were returnin...

Nice solution but I couldn't see the need for currentLevel, surely you can just ...

The problem specification doesn't clarify that this is a *complete* tree... whic...

For the python solution, is the time complexity mainly taken from the inner for ...

For JS, you don't need collections/deque. You can shift/push/etc on a regular ar...