This method only tells you how to see test cases that cannot be seen due to too many test cases during practice, which is definitely not possible during competitions!!!
When you practice, you can see all the test points, and you can alse know you are wrong on which test case, so we can directly output the erroneous test cases by using a special method (such as if judgment) on the erroneous test points through the previous few test points.
An example:
(PS: Please ignore the previous header files, macro definitions, and a bunch of messy functions. Just look at the main function directly. This is my previous habit, and I already know that this habit is not good and have corrected it in the recent div2 competition.)
