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How to Solve the House Robber II Challenge in Java

October 22, 2020

Java

The challenge You are a professional robber planning to rob houses along a street.

How to Clone a Graph in Java

October 21, 2020

Java

The challenge Given a reference of a node in a connected undirected graph.

How to Return Random Values in Java

October 20, 2020

Java

The challenge Ghost objects are instantiated without any arguments. Ghost objects are given a random color attribute of white" or “yellow” or “purple” or “red” when instantiated

How to Compare Version Numbers in Java

October 19, 2020

Java

The challenge Compare two version numbers version1 and version2. If version1&nbsp;>&nbsp;version2 return 1; if version1&nbsp;<&nbsp;version2 return -1;otherwise return ``.

How to Return the First N Elements in Java

October 18, 2020

Java

The challenge Create a method take that accepts a list/array and a number n, and returns a list/array array of the first n elements from the list/array.

How to Search a 2d Matrix/Array in Java

October 17, 2020

Java

The challenge Write an efficient algorithm that searches for a value in an m x n matrix.

Calculate the Surface Area and Volume of a Box with Java

October 16, 2020

Java

The challenge Write a function that returns the total surface area and volume of a box as an array: [area, volume]

Find Numbers which are Divisible by given Number in Java

October 15, 2020

Java

The challenge Complete the function which takes two arguments and returns all numbers which are divisible by the given divisor.

How to Split a Subdirectory to a New Git Repository and Keep the History

October 14, 2020

There comes a time when you need to split out a subdirectory into it’s own git repo.

Get the Maximum XOR of Two Numbers in an Array in Java

October 13, 2020

Java

The challenge Given a non-empty array of numbers, a, a1, a2, … , an-1, where 0 ≤ ai < 231.

How to Get the Opposite of a Number in Java

October 12, 2020

Java

The challenge Given a number, find its opposite. Examples: 1: -1 14: -14 -34: 34 The solution in Java We return the number itself multiplied by a negative 1.

How to Find the Area or Perimeter of a 4-sided Polygon using Java

October 11, 2020

Java

The challenge You are given the length and width of a 4-sided polygon.

How to Parse Int from Char in Java

October 10, 2020

Java

The challenge We take in a String where the first place contains a number, write a function that takes in this String and returns an int containing it.

How to Search a Binary Tree in Java

October 9, 2020

Java

The challenge Given a sorted (in ascending order) integer array nums of n elements and a target value, write a function to search target in nums.

How to Rotate a Singly Linked List in Java

October 8, 2020

Java

The challenge Given a linked list, rotate the list to the right by k places, where k is non-negative.

How to Insert into a Binary Search Tree using Java

October 7, 2020

Java

The challenge You are given the root node of a binary search tree (BST) and a value to insert into the tree.

Find the Complement of Base 10 Integer in Java

October 6, 2020

Java

The challenge Every non-negative integer N has a binary representation. For example, 5 can be represented as "101" in binary, 11 as "1011" in binary, and so on.

Solve the Number of Recent Calls Challenge in Java

October 5, 2020

Java

The challenge You have a RecentCounter class which counts the number of recent requests within a certain time frame.

How to Calculate the Summation of a Number in Java

October 4, 2020

Java

The challenge Write a program that finds the summation of every number from 1 to num.

How to Calculate all Unique Combinations of a Target using Backtracking in Java

October 3, 2020

Java

The challenge Given an array of distinct integers candidates and a target integer target, return a list of all unique combinations of candidates where the chosen numbers sum to target.

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