Kuziyu and Yawen are both going to take the three-story graduation exam. Once they graduate, they will all enter the fourth floor.

no one has given a definite number about what to take in the three-story graduation examination.

the contents of the big test will be different every year.

in the past year's big exams, the first one is array, the second one is rule, and the third one is fight!

the test time of each floor is different every year. It's also because the school is very busy because all the tests are concentrated together.

there are about 200 graduates in three floors every year.

there are about 4000...