Problem Statement Given an array of integers nums, sort the array in increasing order based on the frequency of the values. If multiple values have the same frequency, sort them in decreasing order. Example nums = [1,1,2,2,2,3] [3,1,1,2,2,2] Explanation: ‘3’ has a frequency of 1, ‘1’ has a frequency of …
Problem Statement In this problem two arrays are given and we have to find out the intersection of this two arrays and return the resultant array. Each element in the result should appear as many times as it shows in both arrays. The result can be in any order. Example …
The problem Jewels and Stones Leetcode Solution states that you are given two strings. One of them represents jewels and one of them represents stones. The string that contains jewels represents the characters that are jewels. We need to find the number of characters in the stones string that are …
The problem Shortest Completing Word Leetcode Solution states that you are given a license plate and an array of os strings. You need to find the shortest completing word. A competing word is defined as a word that has all the alphabets in the license plate (case insensitive). The frequency …
In this problem, we are given two arrays of positive integers. All elements of the second array are distinct and are present in the first array. However, the first array can contain duplicate elements or elements that are not in the second array. We need to sort the first array …
HashMap Java stores the data in the form of key-value pairs where the key data should be unique. We can access the values based on the corresponding key data. HashMap is present in Java’s Collection framework and is part of java.util package. It works on the principle of the Hashing …
Problem Statement In the “Convert a String that is Repetition of a Substring of Length K” problem we have given a string “s” and an integer “k”. Write a program to check whether is it possible to convert it to a string that is the repetition of a substring with …
Problem Statement In the “Kth Non-repeating Character” we have given a string “s”. Write a program to find out the kth non-repeating_character. If there are less than k character which is non-repeating in the string then print “-1”. Input Format The first and only one line containing a string “s”. …
Problem Statement In the “Count Number of Substrings with K Distinct Character’s” problem, we have given a string “s” which has only lowercase alphabets and an integer value k. Write a program that will print the number of possible substrings that have exactly k distinct characters. Input Format The first …
Problem Statement In the “Check if Two given Strings are Isomorphic to each other” problem we have given two strings s1 and s2. Write a program that says whether the given strings are isomorphic or not. Note: Two strings are said to be isomorphic if there is a one to …