stock_prices

analyze_stocks

def analyze_stocks(prices)
  best_buy_day = nil
  best_sell_day = nil
  max_profit = 0

  prices.each_with_index do |buy_price, buy_day|
    prices.slice(buy_day..prices.length).each_with_index do |sell_price, sell_day|
      profit = sell_price - buy_price
      if profit > max_profit
        best_sell_day = buy_day + sell_day + 1
        best_buy_day = buy_day + 1
        max_profit = profit
      end
    end
  end
  [best_buy_day, best_sell_day, max_profit]
end

prices = [10,20,4,5,16,1,25,7,0]
puts analyze_stocks(prices).to_s
# prints [6, 7, 24]