摘要：
https://leetcode.com/problems/longest-consecutive-sequence/ Given an unsorted array of integers, find the length of the longest consecutive elements s 阅读全文
摘要：
https://leetcode.com/problems/sum-root-to-leaf-numbers/Given a binary tree containing digits from0-9only, each root-to-leaf path could represent a num... 阅读全文
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https://leetcode.com/problems/combinations/ Given two integers n and k, return all possible combinations of k numbers out of 1 ... n. For example,If n 阅读全文
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https://leetcode.com/problems/spiral-matrix-ii/Given an integern, generate a square matrix filled with elements from 1 ton2in spiral order.For example... 阅读全文
摘要：
https://leetcode.com/problems/spiral-matrix/Given a matrix ofmxnelements (mrows,ncolumns), return all elements of the matrix in spiral order.For examp... 阅读全文