Calculate the sum of two numbers.

Convert minutes to seconds

Retrieve the first element from a non-empty array

Determine if the sum of two numbers is less than 42

Calculate the total fuel needed for a space journey, based on the distance and a minimum fuel reserve requirement

Check if two strings have the same length

Determine if the length of a given string is a multiple of three

Retrieve the last element from a non-empty array

Find the absolute value of a given number

Find the index of a given target value in an array

Convert a time given in hours and minutes to its equivalent in seconds

Concatenate two strings representing a first name and a last name, separated by a space

Combine the elements of two arrays into a new array

Determine if a given number is present in an array of integers

Determine if the last character of a string is 'C' or 'Q', case-insensitive

Filter out elements from an array that are outside a specified range

Create a new array by adding one to each element of the given array

Count how many times a specific character appears in a given string

Reverse the order of elements in an array of integers

Remove the first N characters from a given string. If N exceeds the length of the string, return an empty string

Count the number of words in a given string

Determine if a given string contains one or more spaces

Create a new string by repeating a given string a specified number of times

Create a new string by concatenating the first and last characters of the given string

Count the number of vowels in a given string

Identify the common elements between two arrays

Determine if the average of an array of integers is a whole number

Compute the factorial of a number using recursion

Find the starting index of a substring within a string

Find the character that is present in the modified string but not in the original string

Add two non-negative numbers represented as strings without using built-in conversion functions

Calculate the binary complement of a given number

Determine if it's possible to dock all new boats without adjacent placements

Find self-dividing numbers within a given range

Find the indices of the two numbers in an array that add up to a specific target sum

Calculate the total fuel required for an advanced spaceship

Convert a timecode string in the format hh:mm:ss to total seconds

Check if a given number is a 'happy' number

Determine if a number is a power of two

Determine if a string of words follows a given pattern

Check if a word uses capital letters correctly

Check if a student's attendance record qualifies for an award

Merge two sorted arrays into one sorted array

Find the minimum XOR value that can be obtained from pairing elements in an array

Determine if one string is an anagram of another

Reverse characters of each word in a sentence

Check if a sequence of moves returns the sailboat to the origin

Find the pivot index where left and right sums are equal

Add an integer to an array-form number

Merge two sorted linked lists into one sorted linked list

Reverse a singly linked list

Identify the minimum and maximum values in an array

Determine the median value of an array of integers, rounding down if necessary

Determine if a given number is a perfect square without using the sqrt function

Determine if a string can be constructed by repeating a substring multiple times

Find the maximum product of any three numbers in an array

Check if a string of parentheses, brackets, and braces is balanced

Invert a binary tree by swapping all left and right child nodes

Determine if a given string is a palindrome

Remove all duplicates from a sorted linked list, leaving only distinct numbers

Determine if a binary tree is a mirror of itself (symmetric around its center)

Identify the duplicate and missing number from a sequence

Determine the length of the longest contiguous increasing subsequence

Flip each row horizontally and invert binary values of a matrix

Determine if two binary trees are identical

Sort an array using the insertion sort algorithm

Find the maximum sum of a contiguous subarray in an array of integers

Check if two axis-aligned rectangles overlap

Check if change can be given for all customers at a lemonade stand

Return the middle node of a singly linked list

Determine if all nodes in a binary tree have the same value

Create a new string by reversing the case of each letter in the given string

Reverse the bits of a given 32-bit unsigned integer

Calculate the longest stretch of consecutive sunny days from a sequence of weather entries

Perform a flood fill on an image starting from a specific pixel and change connected pixel colors

Check if a matrix is Toeplitz, where each diagonal has identical elements

Compare two strings after processing backspaces denoted by '#'

Reverse English letters in a string, keeping other characters in place

Determine if two nodes in a binary tree are cousins

Find the weight of the last stone (or zero) after all others have been combined or destroyed according to the game's rules