Employee Free Time
You are given a list of employees’ working hours as a list of intervals. Each interval represents the working hours of an employee, and it is a closed interval (inclusive)…
Coding Patterns
Interval List Intersections
An intersection is a closed interval that represents the overlap between two intervals. If there is no intersection, the result should be an empty list.
Insert Intervals
Given a collection of non-overlapping intervals, represented as pairs of integers , where start denotes the start time of the interval and end denotes the end time of the interval,…
Merge Intervals
Given a collection of intervals, represented as pairs of integers , where start denotes the start time of the interval and end denotes the end time of the interval. Merge…
Non-Overlapping Intervals.
Given a collection of intervals, represented as pairs of integers , where start denotes the start time of the interval and end denotes the end time of the interval. Find…
K Closest Points to Origin
Given an array points representing n points in a 2D plane, where points = , and an integer k, find the k closest points to the origin (0, 0). The…
Find K Closest Elements
Given a sorted integer array arr, two integers x and k, find the k closest elements to x in the array. The result should be sorted in ascending order by…
Top K Frequent Elements
Given an integer array nums and an integer k, return the k most frequent elements in the array. If there are multiple elements with the same frequency, return them in…
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.