Video solution with explanation in C++, Python: https://youtu.be/_I2MIuvbGog
Amazing. Please upvote for karma point its 0 
In subtask 1,What if there are no numbers in the given test case i.e (any number) divisible by ‘a’ then the result will be “ALICE”.But in subtask 1,I have just printed “BOB”.please clarify about it