Merge pull request #1281 from xiaofei-2020/dp14

添加（1049.最后一块石头的重量II.md）：增加typescript版本

problems/1049.最后一块石头的重量II.md

@@ -277,5 +277,26 @@ var lastStoneWeightII = function (stones) {
 };
 ```
 
+TypeScript：
+
+```typescript
+function lastStoneWeightII(stones: number[]): number {
+    const sum: number = stones.reduce((pre, cur) => pre + cur);
+    const bagSize: number = Math.floor(sum / 2);
+    const weightArr: number[] = stones;
+    const valueArr: number[] = stones;
+    const goodsNum: number = weightArr.length;
+    const dp: number[] = new Array(bagSize + 1).fill(0);
+    for (let i = 0; i < goodsNum; i++) {
+        for (let j = bagSize; j >= weightArr[i]; j--) {
+            dp[j] = Math.max(dp[j], dp[j - weightArr[i]] + valueArr[i]);
+        }
+    }
+    return sum - dp[bagSize] * 2;
+};
+```
+
+
+
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