Problem link Even after reading the editorial ,I am not getting clear about how we are managing the rotation part recursively. Thanks for the help in advance.

1.DQUERY I know , it can be done using Mo's algorithm , but I need some hints to solve this using segment tree only. I even tried but It gave WA. Mycode
2.ANDROUND — AND Rounds
3.NICEDAY I tried this but again it gave me WA. But I think , my approach was wrong. My code
Thanks a lot in advance.

Problem link I have applied the same approach as mentioned in the editorial , but I am still getting TLE.I need some hints about where I am doing wrong. Mycodelink Thanks for the help in advance.

Problem Mysolution 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.