162 lines
6.2 KiB
Plaintext
162 lines
6.2 KiB
Plaintext
Advent of Code
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br0xen 44*
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• [About]
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• [Stats]
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• [Leaderboard]
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• [Settings]
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• [Log out]
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--- Day 22: Wizard Simulator 20XX ---
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Little Henry Case decides that defeating bosses with swords and stuff is boring. Now he's
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playing the game with a wizard. Of course, he gets stuck on another boss and needs your help
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again.
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In this version, combat still proceeds with the player and the boss taking alternating turns.
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The player still goes first. Now, however, you don't get any equipment; instead, you must
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choose one of your spells to cast. The first character at or below 0 hit points loses.
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Since you're a wizard, you don't get to wear armor, and you can't attack normally. However,
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since you do magic damage, your opponent's armor is ignored, and so the boss effectively has
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zero armor as well. As before, if armor (from a spell, in this case) would reduce damage below
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1, it becomes 1 instead - that is, the boss' attacks always deal at least 1 damage.
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On each of your turns, you must select one of your spells to cast. If you cannot afford to
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cast any spell, you lose. Spells cost mana; you start with 500 mana, but have no maximum
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limit. You must have enough mana to cast a spell, and its cost is immediately deducted when
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you cast it. Your spells are Magic Missile, Drain, Shield, Poison, and Recharge.
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• Magic Missile costs 53 mana. It instantly does 4 damage.
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• Drain costs 73 mana. It instantly does 2 damage and heals you for 2 hit points.
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• Shield costs 113 mana. It starts an effect that lasts for 6 turns. While it is active,
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your armor is increased by 7.
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• Poison costs 173 mana. It starts an effect that lasts for 6 turns. At the start of each
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turn while it is active, it deals the boss 3 damage.
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• Recharge costs 229 mana. It starts an effect that lasts for 5 turns. At the start of each
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turn while it is active, it gives you 101 new mana.
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Effects all work the same way. Effects apply at the start of both the player's turns and the
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boss' turns. Effects are created with a timer (the number of turns they last); at the start of
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each turn, after they apply any effect they have, their timer is decreased by one. If this
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decreases the timer to zero, the effect ends. You cannot cast a spell that would start an
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effect which is already active. However, effects can be started on the same turn they end.
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For example, suppose the player has 10 hit points and 250 mana, and that the boss has 13 hit
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points and 8 damage:
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-- Player turn --
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- Player has 10 hit points, 0 armor, 250 mana
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- Boss has 13 hit points
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Player casts Poison.
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-- Boss turn --
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- Player has 10 hit points, 0 armor, 77 mana
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- Boss has 13 hit points
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Poison deals 3 damage; its timer is now 5.
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Boss attacks for 8 damage.
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-- Player turn --
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- Player has 2 hit points, 0 armor, 77 mana
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- Boss has 10 hit points
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Poison deals 3 damage; its timer is now 4.
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Player casts Magic Missile, dealing 4 damage.
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-- Boss turn --
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- Player has 2 hit points, 0 armor, 24 mana
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- Boss has 3 hit points
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Poison deals 3 damage. This kills the boss, and the player wins.
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Now, suppose the same initial conditions, except that the boss has 14 hit points instead:
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-- Player turn --
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- Player has 10 hit points, 0 armor, 250 mana
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- Boss has 14 hit points
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Player casts Recharge.
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-- Boss turn --
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- Player has 10 hit points, 0 armor, 21 mana
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- Boss has 14 hit points
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Recharge provides 101 mana; its timer is now 4.
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Boss attacks for 8 damage!
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-- Player turn --
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- Player has 2 hit points, 0 armor, 122 mana
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- Boss has 14 hit points
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Recharge provides 101 mana; its timer is now 3.
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Player casts Shield, increasing armor by 7.
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-- Boss turn --
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- Player has 2 hit points, 7 armor, 110 mana
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- Boss has 14 hit points
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Shield's timer is now 5.
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Recharge provides 101 mana; its timer is now 2.
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Boss attacks for 8 - 7 = 1 damage!
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-- Player turn --
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- Player has 1 hit point, 7 armor, 211 mana
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- Boss has 14 hit points
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Shield's timer is now 4.
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Recharge provides 101 mana; its timer is now 1.
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Player casts Drain, dealing 2 damage, and healing 2 hit points.
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-- Boss turn --
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- Player has 3 hit points, 7 armor, 239 mana
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- Boss has 12 hit points
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Shield's timer is now 3.
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Recharge provides 101 mana; its timer is now 0.
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Recharge wears off.
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Boss attacks for 8 - 7 = 1 damage!
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-- Player turn --
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- Player has 2 hit points, 7 armor, 340 mana
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- Boss has 12 hit points
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Shield's timer is now 2.
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Player casts Poison.
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-- Boss turn --
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- Player has 2 hit points, 7 armor, 167 mana
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- Boss has 12 hit points
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Shield's timer is now 1.
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Poison deals 3 damage; its timer is now 5.
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Boss attacks for 8 - 7 = 1 damage!
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-- Player turn --
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- Player has 1 hit point, 7 armor, 167 mana
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- Boss has 9 hit points
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Shield's timer is now 0.
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Shield wears off, decreasing armor by 7.
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Poison deals 3 damage; its timer is now 4.
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Player casts Magic Missile, dealing 4 damage.
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-- Boss turn --
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- Player has 1 hit point, 0 armor, 114 mana
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- Boss has 2 hit points
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Poison deals 3 damage. This kills the boss, and the player wins.
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You start with 50 hit points and 500 mana points. The boss's actual stats are in your puzzle
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input. What is the least amount of mana you can spend and still win the fight? (Do not include
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mana recharge effects as "spending" negative mana.)
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To begin, get your puzzle input.
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Answer: _____________________ [ [Submit] ]
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You can also [Shareon Twitter Google+ Reddit] this puzzle.
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References
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Visible links
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. http://adventofcode.com/
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. http://adventofcode.com/about
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. http://adventofcode.com/settings
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. http://adventofcode.com/day/21
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. http://adventofcode.com/day/22/input
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