Merge pull request #1322 from xiaofei-2020/dp36

添加（0188.买卖股票的最佳时机IV.md）：增加typescript版本

problems/0188.买卖股票的最佳时机IV.md

@@ -409,5 +409,27 @@ var maxProfit = function(k, prices) {
 };
 ```
 
+TypeScript：
+
+```typescript
+function maxProfit(k: number, prices: number[]): number {
+    const length: number = prices.length;
+    if (length === 0) return 0;
+    const dp: number[][] = new Array(length).fill(0)
+        .map(_ => new Array(k * 2 + 1).fill(0));
+    for (let i = 1; i <= k; i++) {
+        dp[0][i * 2 - 1] = -prices[0];
+    }
+    for (let i = 1; i < length; i++) {
+        for (let j = 1; j < 2 * k + 1; j++) {
+            dp[i][j] = Math.max(dp[i - 1][j], dp[i - 1][j - 1] + Math.pow(-1, j) * prices[i]);
+        }
+    }
+    return dp[length - 1][2 * k];
+};
+```
+
+
+
 -----------------------
 <div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>