添加123.买卖股票的最佳时机 III-JavaScript版

problems/0123.买卖股票的最佳时机III.md

@@ -278,7 +278,44 @@ class Solution:
         return dp[4]
 ```
 
-Go：
+JavaScript：
+
+> 版本一：
+
+```javascript
+const maxProfit = prices => {
+    const len = prices.length;
+    const dp = new Array(len).fill(0).map(x => new Array(5).fill(0));
+    dp[0][1] = -prices[0];
+    dp[0][3] = -prices[0];
+    for (let i = 1; i < len; i++) {
+        dp[i][0] = dp[i - 1][0];
+        dp[i][1] = Math.max(dp[i - 1][1], dp[i - 1][0] - prices[i]);
+        dp[i][2] = Math.max(dp[i - 1][2], dp[i - 1][1] + prices[i]);
+        dp[i][3] = Math.max(dp[i - 1][3], dp[i - 1][2] - prices[i]);
+        dp[i][4] = Math.max(dp[i - 1][4], dp[i - 1][3] + prices[i]);
+    }
+    return dp[len - 1][4];
+};
+```
+
+> 版本二：
+
+```javascript
+const maxProfit = prices => {
+    const len = prices.length;
+    const dp = new Array(5).fill(0);
+    dp[1] = -prices[0];
+    dp[3] = -prices[0];
+    for (let i = 1; i < len; i++) {
+        dp[1] = Math.max(dp[1], dp[0] - prices[i]);
+        dp[2] = Math.max(dp[2], dp[1] + prices[i]);
+        dp[3] = Math.max(dp[3], dp[2] - prices[i]);
+        dp[4] = Math.max(dp[4], dp[3] + prices[i]);
+    }
+    return dp[4];
+};
+```