309.最佳买卖股票时机含冷冻期
class Solution:
def maxProfit(self, prices: List[int]) -> int:
# dp[i][0] 持有股票
# dp[i][1] 卖出股票那一天
# dp[i][2] 冷冻期
# dp[i][3] 保持卖出股票的状态
dp = [[0] * 4 for _ in range(len(prices))]
# 初始化
dp[0][0] = -prices[0]
for i in range(1, len(prices)):
dp[i][0] = max(dp[i-1][0], max(dp[i-1][2] - prices[i], dp[i-1][3] - prices[i]))
dp[i][1] = dp[i-1][0] + prices[i]
dp[i][2] = dp[i-1][1]
dp[i][3] = max(dp[i-1][3], dp[i-1][2])
return max(dp[-1][1], dp[-1][2], dp[-1][3])
714.买卖股票的最佳时机含手续费
class Solution:
def maxProfit(self, prices: List[int], fee: int) -> int:
# dp[i][0] 持有股票
# dp[i][1] 卖出股票
dp = [[0] * 2 for _ in range(len(prices))]
dp[0][0] = -prices[0]
for i in range(1, len(prices)):
dp[i][0] = max(dp[i-1][0], dp[i-1][1] - prices[i])
dp[i][1] = max(dp[i-1][1], dp[i-1][0] + prices[i] - fee)
return dp[-1][1]