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<aside> 💡 First Try On Your Own. Then Come To These Solutions
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One of the basic structures in algorithm which can be used to achieve lots of funny algorithms and problems.
There will be some of the most typical problems in this aspect, which I believe almost covers all the basic techniques that you need to solve a linked list problem.
Given a sorted linked list, delete all duplicates such that each element appear only once.
For example, Given 1->1->2, return 1->2.Given 1->1->2->3->3, return 1->2->3.