IT'S YOU!!! CODEFORCES ROUND 1091 C!!!

IT'S NOT FUN AT ALL!!!

IT MADE ME SUFFER!!!

YOU DON'T NEED ANY ALGORITHMS FOR THIS!!!

YOU JUST NEED TO BE GOOD AT MATH — OR JUST GET LUCKY AND GUESS!!!

YOU MAY HAVE SPENT A LOT OF TIME TRYING TO PROVE IT, WHILE OTHERS JUST GUESSED THE SOLUTION!!!