Sample

gistfile1.js

/**
 * Given a list of daily stock prices, return the three stocks with the highest average price.
 *
 * @param {string[]} stocks - An array of strings, representing the stock names.
 * @param {number[][]} prices - An array of arrays, where prices[i] is an array of daily prices for stocks[i].
 * @returns {string[]} An array containing the names of up to three stocks with the highest average price,
 * sorted by decreasing average value.
 */
function getTopStocks(stocks, prices) {
  // Step 1: Calculate the average price for each stock and store it.
  const stockDataWithAverages = [];

  for (let i = 0; i < stocks.length; i++) {
    const stockName = stocks[i];
    const dailyPrices = prices[i];
    let averagePrice = 0; // Default average if no prices are available or list is empty

    if (dailyPrices && dailyPrices.length > 0) {
      const sumOfPrices = dailyPrices.reduce((total, currentPrice) => total + currentPrice, 0);
      averagePrice = sumOfPrices / dailyPrices.length;
    }

    stockDataWithAverages.push({
      name: stockName,
      average: averagePrice
    });
  }

  // Step 2: Sort the stocks by their average price in descending order.
  stockDataWithAverages.sort((stockA, stockB) => stockB.average - stockA.average);

  // Step 3: Extract the names of the top three (or fewer, if not enough stocks).
  const topStocks = stockDataWithAverages.slice(0, 3);
  const topStockNames = topStocks.map(stock => stock.name);

  return topStockNames;
}

// Example usage based on the problem description's structure:
// const exampleStocks = ["AMZN", "CACC", "EQIX", "GOOG", "ORLY", "ULTA"];
// const examplePrices = [
//   [12.01, 11.09, 12.11, 10.93, 9.83, 8.14], // AMZN prices
//   [10.34, 10.56, 10.14, 12.17],            // CACC prices
//   // ... (prices for EQIX, GOOG, ORLY, ULTA would follow)
// ];
// If GOOG, ORLY, AMZN have the top 3 averages in that order, the call:
// getTopStocks(exampleStocks, examplePrices) would return ["GOOG", "ORLY", "AMZN"]