InterviewBit Problems   Substring Concatenation : Unsolved

About the Substring Concatenation : Unsolved category (1)
Bruteforce solution without using any hash (2)
Confusion in Expected Output (2)
Hey geeks, see this before solving (1)
Constraints missing (1)
This is more of a 350 - 255 problem not a 1000 mks one (1)
Your code might be failing for larger test-cases? But Test case is not shown (1)
Possible issue with expected output (2)
On submit, expected output is empty but works in custom output (1)
Wrong output on submission? (3)
Right answer while testing, wrong answer on submit (3)
Expected output shows nothing (2)
Explain Sample Test Case (2)
Easy Problem but tricky test cases (1)
Not Worth 1000 Points (2)
Error in custom input (1)
I wasn't expecting my (n-k)*k solution to pass (k is the total length of words ar (2)
For me it was a vague description. Task gives you a lot of points, but it's not s (1)
It took me a while, but so worth the trouble. Awesome problem! (1)
One of best problem of this site. Kudos to the person who designed the testcases! (2)
What is the order in which they ll be concatenated? like any permutation or somet (2)