Значення змінної 1#8825
Тести не перевіряють, чи залишається три цифри після коми
How do the test suites check my output? I don't understand what data they test my code with. How can I possibly know what is wrong with my code!?
user685062 there is an article about it.
You have to write a solution which can find an answer for every valid input. If you know the input, it ruins the fun of solving the problem.