could be please help out in this… where i can find the past contest.
How to find the archive contents on hackerblocks
Yes, if you have the contest id you can
If you need any question ,Almost number of questions are same in every batch
Go to Hackerblocks
Then, click on contests
Then, choose any particular contest…
After that, you can search the question
if this solves your doubt please mark it as resolved and rate as well 
@aa1 i not able to get this contest id is 1903. But after few week back i getting a section for archieve contest which held in past… but now i am not able to find any contents there. Like some placement preparation series contents all are missing there. So could you please help me out in this ??
@aa1 like suppose i have to solve this problem on this https://hack.codingblocks.com/app/contests/936
you can start the challenge and attempt this
https://hack.codingblocks.com/app/contests/1903
you can keep changing the contest id here and access these
press Yes,start with my test and then you can attempt the questions