Update stock notes

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Sainnhe Park 2023-02-10 10:01:40 +08:00
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@ -16,3 +16,18 @@
- `dp[0][0] = -prices[0]`
- `dp[0][1] = 0`
- 遍历顺序:从前往后
## [123.买卖股票的最佳时机III](https://leetcode.cn/problems/best-time-to-buy-and-sell-stock-iii/)
- `dp[i][j][k]` 是第 `i` 笔交易中,第 `j` 天,是否持有股票时的总资产
- 递推公式:
- `dp[0][i][0] = max(dp[0][i - 1][0], -prices[i])`
- `dp[0][i][1] = max(dp[0][i - 1][1], dp[0][i][0] + prices[i])`
- `dp[1][i][0] = max(dp[1][i - 1][0], dp[0][i - 1][1] - prices[i])`
- `dp[1][i][1] = max(dp[1][i - 1][1], dp[0][i - 1][0] + prices[i])`
- 初始化:
- `dp[i][0][0] = -prices[0]`
- `dp[i][0][1] = 0`
- 遍历顺序:
- 先遍历 `i`
- 再遍历 `j``k`