Merge pull request #1306 from xiaofei-2020/dp29

添加（0198.打家劫舍.md）：增加typescript版本

problems/0198.打家劫舍.md

@@ -189,6 +189,29 @@ const rob = nums => {
 };
 ```
 
+TypeScript：
+
+```typescript
+function rob(nums: number[]): number {
+    /**
+        dp[i]: 前i个房屋能偷到的最大金额
+        dp[0]: nums[0];
+        dp[1]: max(nums[0], nums[1]);
+        ...
+        dp[i]: max(dp[i-1], dp[i-2]+nums[i]);
+     */
+    const length: number = nums.length;
+    if (length === 1) return nums[0];
+    const dp: number[] = [];
+    dp[0] = nums[0];
+    dp[1] = Math.max(nums[0], nums[1]);
+    for (let i = 2; i < length; i++) {
+        dp[i] = Math.max(dp[i - 1], dp[i - 2] + nums[i]);
+    }
+    return dp[length - 1];
+};
+```
+