At yesterday's competition Div. 3, my solution to problem D crashed on the system test and gave the verdict: Memory limit exceeded on test 9, but when I sent the same code after the system test it passed!

Code that crashed on system testing — 247076528.

Code that passed after system testing — 247189952.

They are identical! It's very strange why this happened, because the limits are small and I was sure that my task would pass system testing.