Solve leetcode problem with write, test your custom test case on Visual Studio Code, c++ language
Write your own test case and testing it
T1 for return type and others for parameter if you want to return vector type. Use runTestCaseVector instead of runTestCase and T1 will be vector element type (vector<"T1">)
If you want to add more parameter (up to 3 recently), you need to adjust code in code.cpp and testcase.cpp or just use vector :)
Write your solution! When done, just simply run the file and the test will check your solution
I know leetcode already have this :D