Arrays
Arrays
Easy
Monotonic Arrays
A monotonic array is an array whose elements, from left to right, are entirely non-increasing, or entirely non-decreasing. Return true if the given ar...
Medium
Spiral Traversal
Given a 2D matrix of numbers, return a spiral traversal of the matrix in the clockwise direction.
Easy
Three Number Sum
Given an array of integers, find three integers in the array that sum to a specific target number.
Easy
Product Sum
Given an array (that can have nested arrays) - return the sum of all the numbers in the array. If nested array is encountered, recursively add the num...
Easy
Non Repeating First Character
Given a string of characters, return the index of the first non-repeating character.
Medium
Maximum Subset Sum With No Adjacent
Given an array of POSITIVE INTEGERS, find the greatest sum that can be generated without adding 2 numbers positioned next to each other.
Medium
Transfer List
Given a list of checkbox items, transfer checked items from one container to the other.
Easy
Select All Checkboxes
Given a `Select All` checkbox - toggle the children's checkboxes in such a way that when the `select all` button is clicked, all the boxes are checked...
Easy
Sorted Squared Array
Given an array of integers A sorted in non-decreasing order, return an array of the squares of each number, also in sorted non-decreasing order.
Easy
Binary Search
Given an array of sorted integers in ascending order, and a target integer, write a function to search target in nums array. If target exists, return ...
Easy
Nth Fibonacci
Given an integer n, return the nth Fibonacci number. In mathematics, the Fibonacci numbers form a sequence called the Fibonacci sequence - In which ea...
Easy
Smallest Difference
Given two arrays of integers, find the pair of values (one value in each array) with the smallest (non-negative) difference.
Easy
Move Element
Given an array of integers and a target value, move all instances of that target value to the end end of the array. The order of the resulting array d...
Medium
Minimum Number Of Coins To Make Change
Given an array of coins or denominations and a target sum, calculate the minimum number of coins required to match the total. Note that the coins arra...