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Understanding the Problem: Given a string, our goal is to sort its characters based on their frequency. For example, for the input “tree,” the output should be “eert” or “eetr,” as both have the same characters but with different arrangements based on frequency. Approach: To tackle this problem, we’ll employ a HashMap to store each…
The First Unique Character in a String problem is a common algorithmic challenge where the goal is to find the index of the first non-repeating character in a given string. In this blog, we will explore the problem, understand the solution, and discuss the implementation details. Problem Statement Given a string s, we are required…
Problem Statement: Given an array of integers and a threshold value k, the task is to divide the array into triplets such that the absolute difference between adjacent elements in each triplet does not exceed k. If such division is possible, return the triplets; otherwise, return an empty array. Approach: To efficiently divide the array…
The Challenge The objective of the minSteps method is to calculate the minimum number of steps needed to make two strings, s and t, anagrams of each other. An anagram is a word or phrase formed by rearranging the letters of another, using all the original letters exactly once. Breaking Down the Java Solution Step-by-Step…
Problem: https://leetcode.com/problems/determine-if-string-halves-are-alike/description/ Breaking Down the Solution Converting String to Char Array: The input string s is converted into a character array a. This facilitates easy traversal and access to individual characters. Initialization and Set of Vowels: A HashSet vowels is created to store the vowels that need to be checked. The size of the array…
Introduction: The problem involves identifying pairs of indices in an array that satisfy certain conditions, with a specific mathematical operation. This blog will discuss the problem, the provided solution, and break down the code for a better understanding. Problem Overview: The goal is to find the count of such nice pairs of indices. Due to…