update: 376

Author: hijiangtao

README.md

@@ -146,7 +146,7 @@ This is the solutions collection of my LeetCode submissions, most of them are pr
 | 350 | [Intersection of Two Arrays ii](https://leetcode.com/problems/intersection-of-two-arrays-ii/)                                                   | [JavaScript](./src/intersection-of-two-arrays-ii/res.js)                                                              | Easy       |
 | 371 | [Sum of Two Integers](https://leetcode.com/problems/sum-of-two-integers/)                                                                       | [JavaScript](./src/sum-of-two-integers/res.js)                                                                        | Easy       |
 | 374 | [Guess Number Higher or Lower](https://leetcode.com/problems/guess-number-higher-or-lower/)                                                     | [JavaScript](./src/guess-number-higher-or-lower/res.py)                                                               | Easy       |
-| 376 | [Wiggle Subsequence](https://leetcode.com/problems/wiggle-subsequence/)                                                                         | [JavaScript](./src/wiggle-subsequence/res.js)                                                                         | Medium     |
+| 376 | [Wiggle Subsequence](https://leetcode.com/problems/wiggle-subsequence/)                                                                         | [JavaScript](./src/wiggle-subsequence/res.js) · [TypeScript](./src/wiggle-subsequence/res.ts)                         | Medium     |
 | 384 | [Shuffle an Array](https://leetcode.com/problems/shuffle-an-array/)                                                                             | [JavaScript](./src/shuffle-an-array/res.js)                                                                           | Medium     |
 | 395 | [Longest Substring with At Least K Repeating Characters](https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters/) | [JavaScript](./src/longest-substring-with-at-least-k-repeating-characters/res.js)                                     | Medium     |
 | 404 | [Sum of Left Leaves](https://leetcode.com/problems/sum-of-left-leaves/)                                                                         | [JavaScript](./src/sum-of-left-leaves/res.js)                                                                         | Easy       |

src/wiggle-subsequence/res.ts

@@ -0,0 +1,13 @@
+function wiggleMaxLength(nums: number[]): number {
+    let up = 1, down = 1;
+
+    for (let i = 1; i < nums.length; i++) {
+        if (nums[i] > nums[i-1]) {
+            up = down + 1;
+        } else if (nums[i] < nums[i-1]) {
+            down = up + 1;
+        }
+    }
+
+    return Math.max(up, down);
+};