One of the test cases is not passed

#1
#2

your buildtree() has some problems.
check the modified code here: https://ide.codingblocks.com/s/209773

thanks

#3

This code is also failing that particular test case.
Please look into it.
Thanks

#4

it passed all the test cases here: https://hack.codingblocks.com/app/contests/1309/1256/problem

can you please send me the link of platform where 1 test case is failing.

thanks

#5

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