Implement heap Implement queue using stack reverse a linkedList find an Element in rowwise and columnwise sorted array

Alien Dictionary (complete code) Arrange array in increasing decreasing pattern. (Just the logic) Find disjoint sets of n merging linked lists Nuts and bolts problem. Pure virtual and virtual functions in OOPS. You are given a stream of coordinates and for every point you have to tell if this point makes a square parallel to the coordinate axis. (complete code)