SIR, ACCORDING TO ME I HV INCLUDED ALL THE POSSIBLE CASES FOR LEBAMBOO… BUT STILL DON’T KNOW WHY IT IS GIVING LEBAMBOO…
QUESTION LINK – http://www.codechef.com/OCT13/problems/LEBAMBOO/
SOLUTION LINK — http://ideone.com/D2vvp2
Hey, use this little script to generate a test case file(input.txt) with random test cases.
Feed this test case file to your program(Linux command: cat input.txt|./a.out > output).
Feed the same file to one of the accepted solutions(Linux command: cat input.txt|./b.out > output_correct).
Then compare the two files(Linux command: vimdiff output output_correct)
See which case fails and then debug. 
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@asvcracker007 Your code fails for this test case:
3
1 1 1
1 1 2
Answer should be -1 but your code returns 1.Here is ideone link. Handling such cases should get AC on your code.
In ur solution after checking if ‘a’ is integer .U will have to check for every i whether (a-di+hi)/2 is integer or not.if for every i it gives integer then ans is ‘a’ otherwise -1…hi is initial height of plant i and di is final height of plant i…
(a-di+hi)/2 is the number of bottles used for plant i…