About integrals. You wait for me, I wait for you, make an appointment (shutter), and you and I will make an appointment separately. About integrals. I don't know if it's right. If they are equal, we can only say that the riddle of the landlord does not conform to the rules.

The answer upstairs is very good, but not here. In a riddle, the words in the riddle should not appear in the answer, which is stipulated by the guessing rules.