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+--- Day 22: Crab Combat ---
+
+It only takes a few hours of sailing the ocean on a raft for boredom to sink in. Fortunately, you
+brought a small deck of space cards! You'd like to play a game of Combat, and there's
+even an opponent available: a small crab that climbed aboard your raft before you left.
+
+Fortunately, it doesn't take long to teach the crab the rules.
+
+Before the game starts, split the cards so each player has their own deck (your puzzle input). Then,
+the game consists of a series of rounds: both players draw their top card, and the
+player with the higher-valued card wins the round. The winner keeps both cards, placing them on the
+bottom of their own deck so that the winner's card is above the other card. If this causes a player
+to have all of the cards, they win, and the game ends.
+
+For example, consider the following starting decks:
+
+Player 1:
+9
+2
+6
+3
+1
+
+Player 2:
+5
+8
+4
+7
+10
+
+This arrangement means that player 1's deck contains 5 cards, with 9 on top and 1 on the bottom;
+player 2's deck also contains 5 cards, with 5 on top and 10 on the bottom.
+
+The first round begins with both players drawing the top card of their decks: 9 and 5. Player 1 has
+the higher card, so both cards move to the bottom of player 1's deck such that 9 is above 5. In
+total, it takes 29 rounds before a player has all of the cards:
+
+-- Round 1 --
+Player 1's deck: 9, 2, 6, 3, 1
+Player 2's deck: 5, 8, 4, 7, 10
+Player 1 plays: 9
+Player 2 plays: 5
+Player 1 wins the round!
+
+-- Round 2 --
+Player 1's deck: 2, 6, 3, 1, 9, 5
+Player 2's deck: 8, 4, 7, 10
+Player 1 plays: 2
+Player 2 plays: 8
+Player 2 wins the round!
+
+-- Round 3 --
+Player 1's deck: 6, 3, 1, 9, 5
+Player 2's deck: 4, 7, 10, 8, 2
+Player 1 plays: 6
+Player 2 plays: 4
+Player 1 wins the round!
+
+-- Round 4 --
+Player 1's deck: 3, 1, 9, 5, 6, 4
+Player 2's deck: 7, 10, 8, 2
+Player 1 plays: 3
+Player 2 plays: 7
+Player 2 wins the round!
+
+-- Round 5 --
+Player 1's deck: 1, 9, 5, 6, 4
+Player 2's deck: 10, 8, 2, 7, 3
+Player 1 plays: 1
+Player 2 plays: 10
+Player 2 wins the round!
+
+...several more rounds pass...
+
+-- Round 27 --
+Player 1's deck: 5, 4, 1
+Player 2's deck: 8, 9, 7, 3, 2, 10, 6
+Player 1 plays: 5
+Player 2 plays: 8
+Player 2 wins the round!
+
+-- Round 28 --
+Player 1's deck: 4, 1
+Player 2's deck: 9, 7, 3, 2, 10, 6, 8, 5
+Player 1 plays: 4
+Player 2 plays: 9
+Player 2 wins the round!
+
+-- Round 29 --
+Player 1's deck: 1
+Player 2's deck: 7, 3, 2, 10, 6, 8, 5, 9, 4
+Player 1 plays: 1
+Player 2 plays: 7
+Player 2 wins the round!
+
+
+== Post-game results ==
+Player 1's deck: 
+Player 2's deck: 3, 2, 10, 6, 8, 5, 9, 4, 7, 1
+
+Once the game ends, you can calculate the winning player's score. The bottom card in
+their deck is worth the value of the card multiplied by 1, the second-from-the-bottom card is worth
+the value of the card multiplied by 2, and so on. With 10 cards, the top card is worth the value on
+the card multiplied by 10. In this example, the winning player's score is:
+
+   3 * 10
++  2 *  9
++ 10 *  8
++  6 *  7
++  8 *  6
++  5 *  5
++  9 *  4
++  4 *  3
++  7 *  2
++  1 *  1
+= 306
+
+So, once the game ends, the winning player's score is 306.
+
+Play the small crab in a game of Combat using the two decks you just dealt. What is the
+winning player's score?
+
+