Doubly-linked list

[tiputipas]

Hey, I need just one last program, please help me. Here is condition:

Create Doubly-linked list. Write the function, which compress list, from some one after another passing element with equal value leaving only one element.

[tanezavm]

I think you should at least try to code it by yourself and let any brilliant minds here help you or correct you if you have problems at specific point.