All problems

Return the string "Hello World".

Count the number of vowels in a given string.

Sum all the digits of an integer.

Inverse the first and last characters of each word in a string.

Given a list of numbers, find the greatest odd number.

Determine the frequency of the most common letter in a string.

Reverse the order of words in a sentence.

Print the sum of the squares of the even numbers.

Swap the "r" key with the caps lock key.

Create a string concatenating the unique characters from multiple strings.

Repeat the word "Jugly" the same number of times as the length of the word, like a mask.

Determines the number of letters in a word that match their alphabetical position.

Translate a string into morse code.

Simply output the 5 paragraphs of the classic Lorem Ipsum.

Find the missing number from a sequence of numbers.

Find the total area covered by a list of rectangles.

Which letter of the alphabet is missing from the given string?

Sort a string by the frequency of each character.

Compress strings by replacing sequences of identical characters with that character followed by a count.

Sum the intersection of two integer arrays.

Find the longest common prefix string amongst an array of strings.

Find the minimal path sum from the top left to the bottom right of a 2D grid by only moving right or down.

Given an array of integers, increment any duplicate elements until all elements are unique.

Count the number of 1s islands in a matrix of 0s and 1s.

Find the second largest unique difference between any two numbers in an array.

Find the peaks and lows in a given array of integers.

Find the longest palindromic substring of a given string.

Generate a wave pattern based on a string

Convert a roman numeral to an integer.

Find the number represented by the ASCII art.

Calculate the score of a bowling game.

Evaluate the value of an arithmetic expression in Reverse Polish Notation.