In todays contest tourist solved ABC in 5 minutes. He solved C in 3 minutes.
How is that even possible?
C is not a so simple problem, it has a big complicated statement, and it takes some time to observe the task and simplify the computation to be able to do it in O(n) / O(nlogn).
Even top LGM's and reds took 8-10 minutes.
This is completely unbelievable, how can a human possibly possess so much speed?
I cannot imagine someone looking at C, reading and understanding the statement, and thinking of an approach, and then implementing it, all under fucking 3 minutes. HOW IS THIS POSSIBLE !!!!!!!!