Update 0123.买卖股票的最佳时机III.md

problems/0123.买卖股票的最佳时机III.md

@@ -442,6 +442,24 @@ impl Solution {
 }
 ```
 
+> 版本二（绕）
+
+```rust
+impl Solution {
+    pub fn max_profit(prices: Vec<i32>) -> i32 {
+        let mut dp = vec![0, -prices[0], 0, -prices[0], 0];
+
+        for p in prices {
+            dp[1] = dp[1].max(-p);
+            dp[2] = dp[2].max(dp[1] + p);
+            dp[3] = dp[3].max(dp[2] - p);
+            dp[4] = dp[4].max(dp[3] + p);
+        }
+        dp[4]
+    }    
+}
+```
+
 
 <p align="center">
 <a href="https://programmercarl.com/other/kstar.html" target="_blank">