gistfile1.txt

class Solution:
    def maxProfit(self, prices: List[int]) -> int:
        buy1,buy2 = -sys.maxsize,-sys.maxsize
        profit1,profit2 = 0,0
        for price in prices:
            buy1 = max(buy1, -price)
            profit1 = max(profit1, buy1 + price)
            buy2 = max(buy2, profit1 - price)
            profit2 = max(profit2, buy2 + price)
        return profit2