When I was solving a problem yesterday, I came up with a possible way but couldn't guarantee that it'll pass, since I wasn't able to come up with another solution then, I decided to submit it and it surprisingly passed!
Problem:https://codeforces.net/contest/1941/problem/F
My submission:https://codeforces.net/contest/1941/submission/256085119
But after a few hour, I realized that the solution can be hacked and came up with the test.
The generator
And that's why now I have some questions, is it possible to add any test now, and if it's possible, will this test be added? Thanks for your answer.