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!!!



