2022 Day 23 Complete

2022/day21/problem

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+                                                              /*2022*/
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+   Our sponsors help make Advent of Code possible:
+   Teradyne - Do you like coding algorithms where milliseconds matter? What about nanoseconds?
+
+--- Day 21: Monkey Math ---
+
+   The monkeys are back! You're worried they're going to try to steal your stuff again, but it seems like they're just
+   holding their ground and making various monkey noises at you.
+
+   Eventually, one of the elephants realizes you don't speak monkey and comes over to interpret. As it turns out, they
+   overheard you talking about trying to find the grove; they can show you a shortcut if you answer their riddle.
+
+   Each monkey is given a job: either to yell a specific number or to yell the result of a math operation. All of the
+   number-yelling monkeys know their number from the start; however, the math operation monkeys need to wait for two other
+   monkeys to yell a number, and those two other monkeys might also be waiting on other monkeys.
+
+   Your job is to work out the number the monkey named root will yell before the monkeys figure it out themselves.
+
+   For example:
+
+ root: pppw + sjmn
+ dbpl: 5
+ cczh: sllz + lgvd
+ zczc: 2
+ ptdq: humn - dvpt
+ dvpt: 3
+ lfqf: 4
+ humn: 5
+ ljgn: 2
+ sjmn: drzm * dbpl
+ sllz: 4
+ pppw: cczh / lfqf
+ lgvd: ljgn * ptdq
+ drzm: hmdt - zczc
+ hmdt: 32
+
+   Each line contains the name of a monkey, a colon, and then the job of that monkey:
+
+     • A lone number means the monkey's job is simply to yell that number.
+     • A job like aaaa + bbbb means the monkey waits for monkeys aaaa and bbbb to yell each of their numbers; the monkey
+       then yells the sum of those two numbers.
+     • aaaa - bbbb means the monkey yells aaaa's number minus bbbb's number.
+     • Job aaaa * bbbb will yell aaaa's number multiplied by bbbb's number.
+     • Job aaaa / bbbb will yell aaaa's number divided by bbbb's number.
+
+   So, in the above example, monkey drzm has to wait for monkeys hmdt and zczc to yell their numbers. Fortunately, both
+   hmdt and zczc have jobs that involve simply yelling a single number, so they do this immediately: 32 and 2. Monkey drzm
+   can then yell its number by finding 32 minus 2: 30.
+
+   Then, monkey sjmn has one of its numbers (30, from monkey drzm), and already has its other number, 5, from dbpl. This
+   allows it to yell its own number by finding 30 multiplied by 5: 150.
+
+   This process continues until root yells a number: 152.
+
+   However, your actual situation involves considerably more monkeys. What number will the monkey named root yell?
+
+   To begin, get your puzzle input.
+
+   Answer: _____________________ [ [Submit] ]
+
+   You can also [Shareon Twitter Mastodon] this puzzle.
+
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