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Update on April 26: Reject!

Coding 1:

• Find First and Last Position of Element in Sorted Array (but we some modification). I found Find First and Last Position of Element in Sorted Array as the closest one to the problem.
• Shortest Path in a Grid (with small change)

Coding 2: It was for the training purpose

• Valid Phone Numbers
• Palindrome Partitioning II (came with a follow up question)

Coding 3:

• Shortest Path to Get All Keys
• Merge k Sorted Lists

Research and Expreince round: combination of my research and behavioral questions!

System design: camelcamelcamel.com

In total, I think all coding rounds were successful. I did good in behavioral round (hopefully). For the sys design qusetion, I did struggle at the first, then getting some hints from the interviewer, I was able to talk about requirements, some design components, etc, but I am not sure if my performnace was satisfying or not! I wish the qusetion was to design one of the FB products! Bad luck for me :/