You are given an array of integers. Your task is to reorder the array such that the elements alternate between smaller and larger numbers. The sequence should follow the pattern nums[0] < nums[1] > nums[2] < nums[3] > nums[4]….
Given an array of points on a 2D plane, find the k closest points to the origin (0, 0) based on Euclidean distance. If multiple points have the same distance, any order is acceptable.
You are given a 2D matrix of size m x n, consisting of non-negative integers. You are also given an integer k. The value of coordinate (a, b) in the matrix is the XOR of all the values from matrix[0][0] to matrix[a][b] (inclusive), where 0 <= a < m and 0 <= b < n (0-indexed). Your task is to find the kth largest value (1-indexed) among all the XOR values of matrix coordinates.
You are given an array of strings nums, where each string represents a non-negative integer. You need to find the kth largest integer in the array. Note that duplicates should be considered distinctly. For example, if the array is [‘1’, ‘2’, ‘2’], the first largest integer is ‘2’, the second largest is also ‘2’, and the third largest is ‘1’.
