380C In this problem I have sumbitted Solution which got failed test case 13. I don't know how to not get my time limit exceede. I have seen other users solution, but nothing I can understand as most of them seem to use same recursive method which is same as implementation of segment tree. I have read a blog post of efficient implementation. But I don't understand why my solution couldn't pass the test 13 with an error of time limit exceeded. Can someone help me with this ?? Thanks for your help.