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.
Sort Array by Increasing Frequency
Given an array nums of integers, you need to sort the array in increasing order based on the frequency of the values. If two values have the same frequency, sort…
Least Number of Unique Integers after K Removals
Given an array arr of integers and an integer k, you need to find the least number of unique integers after removing exactly k elements from the array.
Missing Number
You are given an array nums containing n distinct numbers taken from the range . The array has one missing number from this range. Find the missing number. Sample Input…
Set Mismatch
You have a set of integers nums that contains integers from 1 to n. However, there is one duplicate number and one missing number in the set. Return an array…
Find the Duplicate Number
Given an array nums containing n + 1 integers where each integer is in the range , prove that there is only one duplicate number in the array. Return this…