[Binary Tree Right Side View] Reduce the lines of code to around one third about leetcode HOT 2 CLOSED

Hi @zhuangh

I think you probably didn't read my code carefully. Actually, I wrote two version of the solution, one is recursive version, another one is non-recursive version. (Although they have same function name but the function signature is different, and in the real function, I use random() to invoke these two helper )

Anyway, Thanks so much left your solution here.

P.S. the recursive version's helper just only 4 lines of code, it's almost 1/2 shorter than yours. ;-)

from leetcode.

My bad.
Great! Thanks for pointing out!

from leetcode.