Employee Free Time
You are given a list of employees’ working hours as a list of intervals. Each...
Interval List Intersections
An intersection is a closed interval that represents the overlap between two intervals. If there is no intersection, the result…
Insert Intervals
Given a collection of non-overlapping intervals, represented as pairs of integers [start, end], where start denotes the start time of…
Merge Intervals
Given a collection of intervals, represented as pairs of integers [start, end], where start denotes the start time of the…
Non-Overlapping Intervals.
Given a collection of intervals, represented as pairs of integers [start, end], where start denotes the start time of the…
K Closest Points to Origin
Given an array points representing n points in a 2D plane, where points[i] = [x_i, y_i], and an integer k,…
Find K Closest Elements
Given a sorted integer array arr, two integers x and k, find the k closest elements to x in the…
Top K Frequent Elements
Given an integer array nums and an integer k, return the k most frequent elements in the array. If there…
Sort Characters By Frequency
Given a string s, sort the characters in the string based on their frequency in non-increasing order.
Kth Largest Element in an Array
Given an unsorted array of integers and a positive integer k, find the kth largest element in the array.