leetCode[002]Intersection of Two Linked lists

题目:Intersection of Two Linked lists

Write a program to find the node at which the intersection of two
singly linked lists begins.

    For example, the following two linked lists:

      A: a1 → a2
            ↘
             c1 → c2 → c3
           ↗    
B: b1 → b2 → b3   
 begin to intersect at node c1.

  Notes:
    1. If the two linked lists have no intersection at all, return null.
    2. The linked lists must retain their original structure after the function returns.
    3. You may assume there are no cycles anywhere in the entire linked structure.
    4. Your code should preferably run in O(n) time and use only O(1) memory

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leetCode[001]Maximum Product Subarray

题目:

Find the contiguous subarray within an array (containing at least one number) which has the largest product.
For example, given the array [2,3,-2,4], the contiguous subarray [2,3] has the largest product = 6.

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