From e267f101eea3c2bc2905e60d4472155fcab4b7b9 Mon Sep 17 00:00:00 2001
From: Qi Jia <13632059+jackeyjia@users.noreply.github.com>
Date: Fri, 9 Jul 2021 20:56:24 -0700
Subject: [PATCH] add js solution for maxProfit with Cooldown

---
 ...09.最佳买卖股票时机含冷冻期.md | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/problems/0309.最佳买卖股票时机含冷冻期.md b/problems/0309.最佳买卖股票时机含冷冻期.md
index 4667c122..e28e8369 100644
--- a/problems/0309.最佳买卖股票时机含冷冻期.md
+++ b/problems/0309.最佳买卖股票时机含冷冻期.md
@@ -207,7 +207,29 @@ class Solution:
 
 Go：
 
+Javascript:
 
+```javascript
+const maxProfit = (prices) => {
+    if(prices.length < 2) {
+        return 0
+    } else if(prices.length < 3) {
+        return Math.max(0, prices[1] - prices[0]);
+    }
+
+    let dp = Array.from(Array(prices.length), () => Array(4).fill(0));
+    dp[0][0] = 0 - prices[0];
+
+    for(i = 1; i < prices.length; i++) {
+        dp[i][0] = Math.max(dp[i - 1][0], Math.max(dp[i-1][1], dp[i-1][3]) - prices[i]);
+        dp[i][1] = Math.max(dp[i -1][1], dp[i - 1][3]);
+        dp[i][2] = dp[i-1][0] + prices[i];
+        dp[i][3] = dp[i-1][2];
+    }
+
+    return Math.max(dp[prices.length - 1][1], dp[prices.length - 1][2], dp[prices.length - 1][3]);
+};
+```
 
 
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