best_time_to_buy_sell_stocks

class Solution:
    def maxProfit(self, prices: List[int]) -> int:
        
        buy_price = prices[0]
        mprofit = 0
        
        for i in range(0,len(prices)):
            profit = prices[i] - buy_price
            if profit > mprofit:
                mprofit = profit
            if buy_price > prices[i]:
                buy_price = prices[i]
        return mprofit