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题目: A robot is located at the top-left corner of a m x ngrid (marked 'Start' in the diagram below). The robot can only move either down or right at an 阅读全文
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题目: Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution 阅读全文
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题目: Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to it 阅读全文
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题目: A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null. Return a deep 阅读全文
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题目: Given a set of distinct integers, nums, return all possible subsets. Note: The solution set must not contain duplicate subsets. For example,If num 阅读全文
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