Top K Frequent Elements

Hi Geeks! Welcome to 100 Days Leetcode Challenge. Day 1 Here is our given problem, Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input: nums = [1], k = 1 Output: [1] Note: You may assume k is always valid, 1 ≤ k ≤ … Continue reading Top K Frequent Elements

100 Days Leetcode Challenge

Hi Geeks! Welcome to 100 Days Leetcode challenge. In these days, we going to solve Leetcode's top 100 data structures and algorithm problems. Purpose of 100 Days Leetcode Challenge The main purpose of this challenge is, as a Software Developer we should have a strong command over the algorithms and data structures.Solving these problems daily, … Continue reading 100 Days Leetcode Challenge

Reverse an Integer Digits

In this article, we going to see about How to Reverse an Integer?  Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note:Assume we are dealing with an environment which could only store integers within the … Continue reading Reverse an Integer Digits

2020 – Consistency is the Key

I always used to say, consistency is the key to success. We going to practice the consistency in programming. Why Consistency in programming? Today, in the IT industry, majority of people don't have good command over the subject. Recent studies proven that, there is huge chuck of software engineers are unfit for software development jobs. … Continue reading 2020 – Consistency is the Key

C# Program to Validate IP Address

Hi geeks, in this article we going to see about the Leetcode's Validate Ip Address Problem. This is one of the important interview question. There are different ways to solve this problem like Naive Approach, Straight Forward Approach, etc. But I solved this problem in a efficient way by using Microsoft framework's packages like System.Net, … Continue reading C# Program to Validate IP Address

ZigZag Conversion

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNAPLSIIGYIR" Write the code that will take … Continue reading ZigZag Conversion

Minimum Absolute Difference

Given an array of distinct integers arr, find all pairs of elements with the minimum absolute difference of any two elements.  Return a list of pairs in ascending order(with respect to pairs), each pair [a, b] follows a, b are from arra < bb - a equals to the minimum absolute difference of any two elements in arr Example 1: Input: arr = [4,2,1,3] Output: [[1,2],[2,3],[3,4]] … Continue reading Minimum Absolute Difference