添加（0496.下一个更大元素I.md）：增加typescript版本

Author: xiaofei-2020

problems/0496.下一个更大元素I.md

@@ -332,5 +332,36 @@ var nextGreaterElement = function (nums1, nums2) {
 };
 ```
 
+TypeScript：
+
+```typescript
+function nextGreaterElement(nums1: number[], nums2: number[]): number[] {
+    const resArr: number[] = new Array(nums1.length).fill(-1);
+    const stack: number[] = [];
+    const helperMap: Map<number, number> = new Map();
+    nums1.forEach((num, index) => {
+        helperMap.set(num, index);
+    })
+    stack.push(0);
+    for (let i = 1, length = nums2.length; i < length; i++) {
+        let top = stack[stack.length - 1];
+        while (stack.length > 0 && nums2[top] < nums2[i]) {
+            let index = helperMap.get(nums2[top]);
+            if (index !== undefined) {
+                resArr[index] = nums2[i];
+            }
+            stack.pop();
+            top = stack[stack.length - 1];
+        }
+        if (helperMap.get(nums2[i]) !== undefined) {
+            stack.push(i);
+        }
+    }
+    return resArr;
+};
+```
+
+
+
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