Leetcode-Easy 121. Best Time to Buy and Sell Stock

class Solution:
    def maxProfit(self, prices):
        """
        :type prices: List[int]
        :rtype: int
        """
        max_profit, min_price = 0, float('inf')
        for price in prices:
            min_price=min(min_price,price)
            profit=price-min_price
            max_profit=max(max_profit,profit)
        return max_profit