What Should I do ...?

[anuranjan8319918906 (Anuranjan Shrivastava)]

Which data structure should I use . And What Algorithm Should I apply.How to approch this problem

[Yashwardhan_Gautam]

Hey @anuranjan8319918906, the gist of this problem is same as inversion count, try thinking in terms of merge sort algorithm and you’ll be good to go .