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+--- Part Two ---
+
+The tile floor in the lobby is meant to be a living art exhibit. Every day, the tiles are all
+flipped according to the following rules:
+
+
+ - Any black tile with zero or more than 2 black tiles
+immediately adjacent to it is flipped to white.
+ - Any white tile with exactly 2 black tiles immediately adjacent to it is
+flipped to black.
+
+
+Here, tiles immediately adjacent means the six tiles directly touching the tile in
+question.
+
+The rules are applied simultaneously to every tile; put another way, it is first
+determined which tiles need to be flipped, then they are all flipped at the same time.
+
+In the above example, the number of black tiles that are facing up after the given number of days
+has passed is as follows:
+
+Day 1: 15
+Day 2: 12
+Day 3: 25
+Day 4: 14
+Day 5: 23
+Day 6: 28
+Day 7: 41
+Day 8: 37
+Day 9: 49
+Day 10: 37
+
+Day 20: 132
+Day 30: 259
+Day 40: 406
+Day 50: 566
+Day 60: 788
+Day 70: 1106
+Day 80: 1373
+Day 90: 1844
+Day 100: 2208
+
+After executing this process a total of 100 times, there would be 2208 black tiles
+facing up.
+
+How many tiles will be black after 100 days?
+
+