Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may assume that each input would have exactly one solution, and you may not use the same element twice. You can return the answer in any order. Example 1: Input: nums = [2,7,11,15], target = 9 Output: [0,1] Explanation: Because nums [0] nums [1] == 9, we return [0, 1]. Example 2: Input: nums = [3,2,4], target = 6 Output: [1,2] Example 3: Input: nums = [3,3], target = 6 Output: [0,1] Please implement a Python program and test the program with above 3 examples. Python program template class Solution: def twoSum(self, nums: List[int], target: int) -> List[int]: # Step 1: Test twoSum() with # ... # Step2 # Input: nums = [2,7,11,15], target = 9 .... Test twoSum() with Input: nums [3,2,4], target = 6 # Step 3: Test twoSum() with # nums [3,3], target = 6