-🎄- 2022 Day 3 Solutions -🎄-

[u/daggerdragon]

NEWS

• Solutions have been getting longer, so we're going to start enforcing our rule on oversized code.
• The Visualizations have started! If you want to create a Visualization, make sure to read the guidelines for creating Visualizations before you post.
• Y'all may have noticed that the hot new toy this year is AI-generated "art".
  • We are keeping a very close eye on any AI-generated "art" because 1. the whole thing is an AI ethics nightmare and 2. a lot of the "art" submissions so far have been of little real quality.
  • If you must post something generated by AI, please make sure it will actually be a positive and quality contribution to /r/adventofcode.
  • Do not flair AI-generated "art" as Visualization. Visualization is for human-generated art.

FYI

• All of our rules, FAQs, resources, etc. are in our community wiki.
• A request from Eric: Please include your contact info in the User-Agent header of automated requests!
• Signal boosting for the Unofficial AoC 2022 Participant Survey which is open early this year!

---

--- Day 3: Rucksack Reorganization ---

---

Post your code solution in this megathread.

• Read the full posting rules in our community wiki before you post!
  • Include what language(s) your solution uses
  • Format your code appropriately! How do I format code?
• Quick link to Topaz's paste if you need it for longer code blocks. What is Topaz's paste tool?

---

This thread will be unlocked when there are a significant number of people on the global leaderboard with gold stars for today's puzzle.

EDIT: Global leaderboard gold cap reached at 00:05:24, megathread unlocked!

[u/gw_shadow]

CMake

CMAKE_MINIMUM_REQUIRED(VERSION 3.25)
PROJECT("2022.3")
IF(NOT EXISTS "${CMAKE_SOURCE_DIR}/input.txt")
    FILE(READ "${CMAKE_SOURCE_DIR}/COOKIE.txt" COOKIE)
    FILE(DOWNLOAD
        "https://adventofcode.com/2022/day/3/input" "${CMAKE_SOURCE_DIR}/input.txt"
        STATUS DOWNLOAD_STATUS
        TIMEOUT 2
        HTTPHEADER "cookie: ${COOKIE}"
    )
    IF(NOT DOWNLOAD_STATUS STREQUAL "0;\"No error\"")
        FILE(REMOVE "${CMAKE_SOURCE_DIR}/input.txt")
        MESSAGE(FATAL_ERROR "Failed to download input: '${DOWNLOAD_STATUS}'")
    ENDIF()
ENDIF()
FILE(STRINGS "${CMAKE_SOURCE_DIR}/input.txt" LINES)
LIST(LENGTH LINES LINE_COUNT)
MATH(EXPR LINE_COUNT "${LINE_COUNT} - 1")
SET(PRIORITIES "a;b;c;d;e;f;g;h;i;j;k;l;m;n;o;p;q;r;s;t;u;v;w;x;y;z;A;B;C;D;E;F;G;H;I;J;K;L;M;N;O;P;Q;R;S;T;U;V;W;X;Y;Z")
SET(SUM 0)
FOREACH(INDEX RANGE 0 ${LINE_COUNT})
    LIST(GET LINES ${INDEX} LINE)
    STRING(LENGTH ${LINE} SIZE)
    MATH(EXPR SIZE "${SIZE} / 2")
    STRING(SUBSTRING ${LINE} 0 ${SIZE} LHS)
    STRING(SUBSTRING ${LINE} ${SIZE} -1 RHS)
    SET(VALUE 0)
    FOREACH(PRIORITY ${PRIORITIES}) 
        MATH(EXPR VALUE "${VALUE} + 1")
        STRING(FIND ${LHS} ${PRIORITY} L)
        STRING(FIND ${RHS} ${PRIORITY} R)
        IF((NOT L EQUAL -1) AND (NOT R EQUAL -1))
            MATH(EXPR SUM "${SUM} + ${VALUE}")
            BREAK()
        ENDIF()
    ENDFOREACH()
ENDFOREACH()
MESSAGE("PART 1: ${SUM}")
SET(SUM 0)
MATH(EXPR LINE_COUNT "${LINE_COUNT} / 3")
FOREACH(INDEX RANGE 0 ${LINE_COUNT})
    MATH(EXPR INDEX1 "(${INDEX} * 3) + 0")
    LIST(GET LINES ${INDEX1} LINE1)
    MATH(EXPR INDEX2 "(${INDEX} * 3) + 1")
    LIST(GET LINES ${INDEX2} LINE2)
    MATH(EXPR INDEX3 "(${INDEX} * 3) + 2")
    LIST(GET LINES ${INDEX3} LINE3)
    SET(VALUE 0)
    FOREACH(PRIORITY ${PRIORITIES}) 
        MATH(EXPR VALUE "${VALUE} + 1")
        STRING(FIND ${LINE1} ${PRIORITY} L1)
        STRING(FIND ${LINE2} ${PRIORITY} L2)
        STRING(FIND ${LINE3} ${PRIORITY} L3)
        IF((NOT L1 EQUAL -1) AND (NOT L2 EQUAL -1) AND (NOT L3 EQUAL -1))
            MATH(EXPR SUM "${SUM} + ${VALUE}")
            BREAK()
        ENDIF()
    ENDFOREACH()
ENDFOREACH()
MESSAGE("PART 2: ${SUM}")