The whole process took around 2 months to complete.

I first applied online and received a response within 2 weeks for a phone interview.

I had scheduled the interview for a week later due to my busy schedule.

The phone interview consisted of just one technical question.

After about 3 weeks, I received an email from my recruiter asking me to post my available times for another phone interview.

Given an n x n matrix representing a crossword board, implement a function that verifies that all squares capable of containing letters (the white squares on the crossword board) are connected to each other throughout the entire board.