From e1bfbcde97a68b7df047de77ed50c00e4432edd4 Mon Sep 17 00:00:00 2001 From: Brian Buller Date: Sat, 3 Dec 2022 07:14:41 -0600 Subject: [PATCH] 2022 Day3 Complete! --- 2022/day03/input | 300 +++++++++++++++++++++++++++++++++++++++++++ 2022/day03/main.go | 74 +++++++++++ 2022/day03/problem | 140 ++++++++++++++++++++ 2022/day03/testinput | 6 + 4 files changed, 520 insertions(+) create mode 100644 2022/day03/input create mode 100644 2022/day03/main.go create mode 100644 2022/day03/problem create mode 100644 2022/day03/testinput diff --git a/2022/day03/input b/2022/day03/input new file mode 100644 index 0000000..53d6524 --- /dev/null +++ b/2022/day03/input @@ -0,0 +1,300 @@ +lDDWVvlVVQfDMlWjGJTRjQCgTGLCLj +ZLZpwzLBhwZhSLBsjntGCtgJRjbnJgSG +qppdZzzsdsmZphrNsNwZhllDHLcVVDWFPvFWcWdFlv +ztdhgJDBJghmQtPFQPpmbw +lVlLRcnfllcfVcccGnSQVLcsTPFbpwsPFspTSqmbpswpbF +cCHRGcGcCRGlGrGcVGnrdWHWBDzBNhhQZWWNBhJz +NfnSSQpdnRSSpvWdSsjZDGNDjGDwTGTjHG +wlPzPqzPFbMmqPCFCJmbsjbHLDDHDZjDjbGHsT 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b/2022/day03/main.go @@ -0,0 +1,74 @@ +package main + +import ( + "fmt" + + h "git.bullercodeworks.com/brian/adventofcode/helpers" +) + +func main() { + inp := h.StdinToStringSlice() + fmt.Println("# Part 1") + fmt.Println(part1(inp)) + fmt.Println("# Part 2") + fmt.Println(part2(inp)) +} + +func part1(inp []string) int { + var ret int + for i := range inp { + sack := inp[i] + c1, c2 := sack[:len(sack)/2], sack[len(sack)/2:] + var dupe byte + for _, c1w := range c1 { + for _, c2w := range c2 { + if c1w == c2w { + dupe = byte(c1w) + break + } + } + if dupe != 0 { + break + } + } + if dupe >= 'a' { + ret += int(dupe - 'a' + 1) + } else if dupe >= 'A' { + ret += int(dupe - 'A' + 27) + } + } + return ret +} + +func part2(inp []string) int { + var ret int + elves := []string{"", "", ""} + for i := range inp { + elves[i%3] = inp[i] + if i%3 == 2 { + var badge byte + // Check 'em + for _, e1 := range elves[0] { + for _, e2 := range elves[1] { + for _, e3 := range elves[2] { + if e1 == e2 && e2 == e3 { + badge = byte(e1) + } + } + if badge != 0 { + break + } + } + if badge != 0 { + break + } + } + if badge >= 'a' { + ret += int(badge - 'a' + 1) + } else if badge >= 'A' { + ret += int(badge - 'A' + 27) + } + } + } + return ret +} diff --git a/2022/day03/problem b/2022/day03/problem new file mode 100644 index 0000000..15e0a05 --- /dev/null +++ b/2022/day03/problem @@ -0,0 +1,140 @@ + Advent of Code + + • [About] + • [Events] + • [Shop] + • [Settings] + • [Log Out] + + br0xen (AoC++) 6* + +       /*2022*/ + + • [Calendar] + • [AoC++] + • [Sponsors] + • [Leaderboard] + • [Stats] + + Our sponsors help make Advent of Code possible: + Spotify - Follow our engineering blog to see how our developers solve complex tech problems, at scale, every day. + +--- Day 3: Rucksack Reorganization --- + + One Elf has the important job of loading all of the rucksacks with supplies for the jungle journey. Unfortunately, that + Elf didn't quite follow the packing instructions, and so a few items now need to be rearranged. + + Each rucksack has two large compartments. All items of a given type are meant to go into exactly one of the two + compartments. The Elf that did the packing failed to follow this rule for exactly one item type per rucksack. + + The Elves have made a list of all of the items currently in each rucksack (your puzzle input), but they need your help + finding the errors. Every item type is identified by a single lowercase or uppercase letter (that is, a and A refer to + different types of items). + + The list of items for each rucksack is given as characters all on a single line. A given rucksack always has the same + number of items in each of its two compartments, so the first half of the characters represent items in the first + compartment, while the second half of the characters represent items in the second compartment. + + For example, suppose you have the following list of contents from six rucksacks: + + vJrwpWtwJgWrhcsFMMfFFhFp + jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL + PmmdzqPrVvPwwTWBwg + wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn + ttgJtRGJQctTZtZT + CrZsJsPPZsGzwwsLwLmpwMDw + + • The first rucksack contains the items vJrwpWtwJgWrhcsFMMfFFhFp, which means its first compartment contains the items + vJrwpWtwJgWr, while the second compartment contains the items hcsFMMfFFhFp. The only item type that appears in both + compartments is lowercase p. + • The second rucksack's compartments contain jqHRNqRjqzjGDLGL and rsFMfFZSrLrFZsSL. The only item type that appears in + both compartments is uppercase L. + • The third rucksack's compartments contain PmmdzqPrV and vPwwTWBwg; the only common item type is uppercase P. + • The fourth rucksack's compartments only share item type v. + • The fifth rucksack's compartments only share item type t. + • The sixth rucksack's compartments only share item type s. + + To help prioritize item rearrangement, every item type can be converted to a priority: + + • Lowercase item types a through z have priorities 1 through 26. + • Uppercase item types A through Z have priorities 27 through 52. + + In the above example, the priority of the item type that appears in both compartments of each rucksack is 16 (p), 38 + (L), 42 (P), 22 (v), 20 (t), and 19 (s); the sum of these is 157. + + Find the item type that appears in both compartments of each rucksack. What is the sum of the priorities of those item + types? + + Your puzzle answer was 7967. + +--- Part Two --- + + As you finish identifying the misplaced items, the Elves come to you with another issue. + + For safety, the Elves are divided into groups of three. Every Elf carries a badge that identifies their group. For + efficiency, within each group of three Elves, the badge is the only item type carried by all three Elves. That is, if a + group's badge is item type B, then all three Elves will have item type B somewhere in their rucksack, and at most two of + the Elves will be carrying any other item type. + + The problem is that someone forgot to put this year's updated authenticity sticker on the badges. All of the badges need + to be pulled out of the rucksacks so the new authenticity stickers can be attached. + + Additionally, nobody wrote down which item type corresponds to each group's badges. The only way to tell which item type + is the right one is by finding the one item type that is common between all three Elves in each group. + + Every set of three lines in your list corresponds to a single group, but each group can have a different badge item + type. So, in the above example, the first group's rucksacks are the first three lines: + + vJrwpWtwJgWrhcsFMMfFFhFp + jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL + PmmdzqPrVvPwwTWBwg + + And the second group's rucksacks are the next three lines: + + wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn + ttgJtRGJQctTZtZT + CrZsJsPPZsGzwwsLwLmpwMDw + + In the first group, the only item type that appears in all three rucksacks is lowercase r; this must be their badges. In + the second group, their badge item type must be Z. + + Priorities for these items must still be found to organize the sticker attachment efforts: here, they are 18 (r) for the + first group and 52 (Z) for the second group. The sum of these is 70. + + Find the item type that corresponds to the badges of each three-Elf group. What is the sum of the priorities of those + item types? + + Your puzzle answer was 2716. + + Both parts of this puzzle are complete! They provide two gold stars: ** + + At this point, you should return to your Advent calendar and try another puzzle. + + If you still want to see it, you can get your puzzle input. + + You can also [Shareon Twitter Mastodon] this puzzle. + +References + + Visible links + . https://adventofcode.com/ + . https://adventofcode.com/2022/about + . https://adventofcode.com/2022/events + . https://teespring.com/stores/advent-of-code + . https://adventofcode.com/2022/settings + . https://adventofcode.com/2022/auth/logout + . 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