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【Leecode刷题】77题. Combinations题目：Given two integers n and k, return all possible combinations of k numbers out of 1 … n.测试样例：Input: n = 4, k = 2Output:[[2,4],[3,4],[2,3],[1,2],[1,3],[1,4],]...

LeetCode刷题：80. Remove Duplicates from Sorted Array II题目描述：Given a sorted array nums, remove the duplicates in-place such that duplicates appeared at most twice and return the new length.Do not allo...