Best time to buy and sell stock single transaction

buy_and_sell_stock_single_txn.py

class Solution:
    def maxProfit(self, prices: List[int]) -> int:
        if len(prices) < 2:
            return 0
        
        low_price = prices[0]
        max_profit = 0
        
        for i in range(1, len(prices)):
            if prices[i] > low_price:
                max_profit = max(max_profit, prices[i] - low_price)
            else:
                low_price = prices[i]
        
        return max_profit