tvolk131

let russianDoll = (envelopes) => {
  let maxCount = 0;
  let indicesUsed = {};
  let russianRecurse = (currentCount = 0, lastEnv = [-Infinity, -Infinity]) => {
    if (currentCount > maxCount) {
      maxCount = currentCount;
    }
    envelopes.forEach((envelope, index) => {
      if (!indicesUsed[index] && envelope[0] > lastEnv[0] && envelope[1] > lastEnv[1]) {
        indicesUsed[index] = true;

tvolk131

class Cashinator {
  constructor (initialAmount, taxPercentage, itemList) {
  }

  /**
   * @return {*Current balance in the register}
   */
  getBalance () {
  }

tvolk131

/**
 * @param {number} capacity
 */
var LFUCache = function(capacity) {
  this.nodes = {};
  this.head = null;
  this.tail = null;
  this.size = 0;
  this.capacity = capacity;
};

tvolk131

let isVowel = (letter) => {
  return (letter === 'a' || letter === 'e' || letter === 'i' || letter === 'o' || letter === 'u' || letter === 'A' || letter === 'E' || letter === 'I' || letter === 'O' || letter === 'U');
};

let vowelDoubler = (letters) => {
  for (let i = 0; i < letters.length; i++) {
    if (isVowel(letters[i])) {
      letters.splice(i, 0, letters[i]);
      i++;
    }

tvolk131

/**
 * @param {number[]} nums
 * @return {number[]}
 */
var productExceptSelf = function(nums) {
  let products = [];
  let product = 1;
  nums.forEach((num, i) => {
    products[i] = product;
    product *= num;

tvolk131

const hasPathToSum = function(node, targetSum) {
  
  let hasSum = (sum, node) => {
    sum += node.value;
    if (node.children.length === 0) {
      if (sum === targetSum) {
        return true;
      } else {
        return false;
      }

tvolk131

class CashAmount {
  constructor (amount) {
    this.pennyCount = 0;
    this.addDoubleAmount(amount);
  }

  totalAsPennies () {
    return this.pennyCount;
  }
  totalInPennies () {

tvolk131

const findLargestLevel = function(node) {
  
  var getAllNodeSums = function(node, nodeSums) {
    nodeSums.set(node, getNodeSum(node));
    for(var i = 0; i < node.children.length; i++) {
      getAllNodeSums(node.children[i], nodeSums);
    }
  }
  
  var getNodeSum = function(node) {