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How to Flip a Binary Matrix in Java

November 11, 2020

Java

The challenge Given a binary matrix A, we want to flip the image horizontally, then invert it, and return the resulting image.

How to Tilt a Binary Tree in Java

November 10, 2020

Java

The challenge Given the root of a binary tree, return the sum of every tree node’s tilt.

How to solve the House Robber Challenge in Java

November 9, 2020

Java

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

How to Solve the Bag of Tokens Challenge in Java

November 8, 2020

Java

The challenge You have an initial power of P, an initial score of ``, and a bag of tokens where tokens[i] is the value of the ith token (0-indexed).

How to Find the Smallest Divisor Given a Threshold in Java

November 7, 2020

Java

The challenge Given an array of integers nums and an integer threshold, we will choose a positive integer divisor and divide all the array by it and sum the result of the division.

How to Sort and Star a String Array in Java

November 6, 2020

Java

The challenge You will be given a vector of strings. You must sort it alphabetically (case-sensitive, and based on the ASCII values of the chars) and then return the first value.

How to Count Consecutive Characters in Java

November 5, 2020

Java

The challenge Given a string s, the power of the string is the maximum length of a non-empty substring that contains only one unique character.

How to Abbreviate a Two Word Name in Java

November 4, 2020

Java

The challenge Write a function to convert a name into initials.

How to Sort a Linked List using Insertion Sort in Java

November 3, 2020

Java

The challenge Sort a linked list using insertion sort. A graphical example of insertion sort.

How to Remove First and Last Character in a String in Java

November 2, 2020

Java

The challenge The goal is to create a function that removes the first and last characters of a string.

How to Distribute Halloween Candies by Rating Value in Java

November 1, 2020

Java

The challenge There are N children standing in a line. Each child is assigned a rating value.

How to Distribute Halloween Candies in Java

October 31, 2020

Java

The challenge You have n candies, the ith candy is of type candies[i].

How to Solve the Maximize Distance to Closest Person Challenge in Java

October 30, 2020

Java

The challenge You are given an array representing a row of seats where seats[i] = 1 represents a person sitting in the ith seat, and seats[i] = 0 represents that the ith seat is empty (0-indexed).

How to Get Character from ASCII Value in Java

October 29, 2020

Java

The challenge Write a function which takes a number and returns the corresponding ASCII char for that value.

Finding a Needle in a Haystack in Java

October 28, 2020

Java

The challenge Can you find the needle in the haystack?

How to Solve the Champagne Tower in Java

October 27, 2020

Java

The challenge We stack glasses in a pyramid, where the first row has 1 glass, the second row has 2 glasses, and so on until the 100th row.

How to Solve the 132 Pattern in Java

October 26, 2020

Java

The challenge Given an array of n integers nums, a 132 pattern is a subsequence of three integers nums[i], nums[j] and nums[k] such that i < j < k and nums[i] < nums[k] < nums[j].

How to Replace all Vowels in a String in Java

October 25, 2020

Java

The challenge Replace all vowel to exclamation mark in the sentence.

How to Get the N-th Power in Java

October 24, 2020

Java

The challenge You are given an array with positive numbers and a number N.

How to Count the Minimum Depth of a Binary Tree in Java

October 23, 2020

Java

The challenge Given a binary tree, find its minimum depth.

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