Update README.md

Author: yanglbme

solution/0700-0799/0731.My Calendar II/README.md

@@ -208,6 +208,43 @@ func (this *MyCalendarTwo) Book(start int, end int) bool {
  */
 ```
 
+#### TypeScript
+
+```ts
+class MyCalendarTwo {
+    private events: [number, number][];
+    private overlaps: [number, number][];
+
+    constructor() {
+        this.events = [];
+        this.overlaps = [];
+    }
+
+    book(start: number, end: number): boolean {
+        for (const [s, e] of this.overlaps) {
+            if (Math.max(start, s) < Math.min(end, e)) {
+                return false;
+            }
+        }
+
+        for (const [s, e] of this.events) {
+            if (Math.max(start, s) < Math.min(end, e)) {
+                this.overlaps.push([Math.max(start, s), Math.min(end, e)]);
+            }
+        }
+
+        this.events.push([start, end]);
+        return true;
+    }
+}
+
+/**
+ * Your MyCalendarTwo object will be instantiated and called as such:
+ * var obj = new MyCalendarTwo()
+ * var param_1 = obj.book(start,end)
+ */
+```
+
 #### JavaScript
 
 ```js