memcpy0的博客

We have a list of points on the plane. Find the K closest points to the origin (0, 0).(Here, the distance between two points on a plane is the Euclidean distance.)You may return the answer in any order. The answer is guaranteed to be unique (except for

输入整数数组 arr ，找出其中最小的 k 个数。例如，输入4、5、1、6、2、7、3、8这8个数字，则最小的4个数字是1、2、3、4。示例 1：输入：arr = [3,2,1], k = 2输出：[1,2] 或者 [2,1]示例 2：输入：arr = [0,1,2,1], k = 1输出：[0]限制：0 <= k <= arr.length <= 100000 <= arr[i] <= 10000题意：不用说明。解法1 sort 排序clas

Find the length of the longest substring T of a given string (consists of lowercase letters only) such that every character in T appears no less than k times.Example 1:Input:s = "aaabb", k = 3Output:3The longest substring is "aaa", as 'a' is repeat

Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element.Example 1:Input: [3,2,1,5,6,4] and k = 2Output: 5Example 2:Input: [3,2,3,1,2,4,5,5,6] and k = 4Output: 4No