I seem to have a correct code for this question. I checked for all possible test cases, including numbers with more than one digit, but I am not able to get what this mysterious second test case is. Can some one help me with my code here which looks almost similar to this already solved code here. I don’t understand why the later code is correct and mine is not correct.
Thank you 
How did you arrive at conclusion that numbers with more than 1 digit are a corner case for your approach? 
Cause they are not.
Its because I am told that second test case might fail if the input to the array is more than one digit. Which is, of course, not the corner case. Yeah, I agree with you that it doesn’t really help mentioning that point in the question, but it’s worth a sentence 
Try using getline for input and see if you get AC. I think its worth a try.
I too have a similar problem. What is wrong with my solution? I have tested a lot.This is my submission for LOSTMAX from LTIME50. Further clarifications on where I went wrong is appreciated. Thank You.
Here you go-
Input
1
10 11 12 13 14 15 16 17 18 19 20
Your Output
36700100 (garbage value)
multiple digit numbers are a corner case for your approach
There, your code has got an AC now (re-check the link you posted here )