Hi Experts .

With due respect I would like to Get some help From you about solving Below's interesting problem .

Link : LightOJ — 1095 — Arrange the Numbers

I confess that I did not try this type of problem before . I know the problem can be solved by Combination & DP or Similar other approach . I understand the Problem well . But I want to solve this and I am not getting How to solve it ?? Your Kind help may be very Valuable for me in solving this types of problem.

I Just want some Tutorial about How to solve this problem / this type of Problems .... Any English / Bangla ( Bangladeshi Language) Tutorials are very helpful in that case .

Thanks in Advance .

P.S : It would be better if you provide some tutorials related to this Types of Problems not just for this Problem.