Problem

In Python, method overloading is not supported directly as in Java. Your task is to implement a function add that simulates method overloading by accepting either two integers or two strings, returning their sum or concatenation, respectively.

Requirements:

1. If both arguments are integers, return their sum.
2. If both arguments are strings, return their concatenation.
3. If the arguments are of different types, raise a TypeError.

Examples:

Example 1:

Input: add(5, 10)
Output: 15

Example 2:

Input: add("Hello, ", "World!")
Output: "Hello, World!"

Example 3:

Input: add(5, "test")
Output: TypeError

Constraints:

• Arguments will be either integers or strings.
• No need to handle other data types.