We can see both output the 3-4 elements, even though in their original lists these are not valid since the List slot itself is null. These test cases should be failing as 3-4 elements don't appear in ...

You are given an array of k linked-lists lists, each linked-list is sorted in ascending order. Merge all the linked-lists into one sorted linked-list and return it. - ...

C++, a programming language with a long history yet always fresh, has a legendary status in the world of programming competitions. For many participants in major competitions like the Olympiad in ...