Problem link

My code

This approach is giving wrong answer.

Can you please help me out in this question.

My approach is something like:-

(=+1;

)=-1;

Now I am just checking two conditions.

1.Is the overall sum of the segment is 0 or not because a balanced segment like (()) will be (+1+1-1-1)=0.

2.Now to avoid the conditions like )( , (( , I am checking whether the left child node of the 1st node is having sum>=0 and right child sum<=0.If this gets true , then answer is yes else no.

Thanks in advance.

EDIT: My approach will fail in a testcase like

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