SwellWu的博客

344 reverse string cppclass Solution { public: string reverseString(string s) { reverse(s.begin(),s.end()); return s; } };pythonclass Solution(object): def reverseString(sel

题目Given a non-empty array of integers, return the k most frequent elements.For example, Given [1,1,1,2,2,3] and k = 2, return [1,2].Note: You may assume k is always valid, 1 ≤ k ≤ number of unique

Given two arrays, write a function to compute their intersection.Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2].Note: Each element in the result must be unique. The result can be in an