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Working part 2 solution

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Clement
2024-12-13 16:35:36 +08:00
parent 3764b25f6d
commit beac193288
3 changed files with 47 additions and 23 deletions
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20
2024/day-12/solution-2.sh
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@ -1,11 +1,10 @@
#!/usr/bin/env bash
FUNCNEST=99999
FILE=input
FILE=test-input-1
read -r -a MAP_ARRAY <<< "$( < "$FILE" paste -s -d "" | sed -E 's/(.)/\1\ /g' )"
MAP_LEN=${#MAP_ARRAY[@]}
MAP_WIDTH=$(( $( head -1 "$FILE" | wc -c ) -1 ))
MAP_WIDTH_N1=$(( MAP_WIDTH -1 ))
MAP_WIDTH_INV=$(( 0 - MAP_WIDTH ))
MAP_HEIGHT=$( < "$FILE" wc -l )
printf "Len: %s Width: %s Height: %s\n" "$MAP_LEN" "$MAP_WIDTH" "$MAP_HEIGHT"
@ -17,25 +16,30 @@ check_adjacent () {
DIFF=$(( $2 - $1 ))
# Valid adjacent distances
if [[ $DIFF -eq 1 ]] || [[ $DIFF -eq -1 ]] || [[ $DIFF -eq $MAP_WIDTH ]] || [[ $DIFF -eq $MAP_WIDTH_INV ]] ; then : else return 1 ; fi
if [[ $DIFF -eq 1 ]] || [[ $DIFF -eq -1 ]] || [[ $DIFF -eq $MAP_WIDTH ]] || [[ $DIFF -eq $MAP_WIDTH_INV ]] ; then : ; else return 1 ; fi
# Check for left/right bounds
if [[ $DIFF -eq 1 ]] && [[ $(( $2 % MAP_WIDTH )) -eq 0 ]] ; then return 1 ; fi
if [[ $DIFF -eq -1 ]] && [[ $(( $1 % MAP_WIDTH )) -eq 0 ]] ; then return 1 ; fi
}
# Basically recurse over mapping and "consume" all adjacent tiles
# Basically recurse over kv and "consume" all adjacent tiles
# All tiles that are consumed are adjacent
check_and_unset () {
local KV_I=${1%% *} # Remove trailing whitespace
(( AREA++ ))
VALUE=${KV_CACHE[$KV_I]}
unset "KV_CACHE[$KV_I]" # "Take" it
printf "max: %s peri: %s area: %s key: %s val: %s\n" "$MAX_PERI" "$PERI_NUM" "$AREA" "$1" "$VALUE" >&2
# As a square, expect width and height to always be preserved
# Recursion should always be in sequence
unset IFS; read -r -a VAL_ARRAY <<< "$VALUE"
# Loop through adjacent tiles and recurse
for VAL in "${VAL_ARRAY[@]}"
for VAL in "${VAL_ARRAY[@]}" # VAL_ARRAY is always sorted
do
VAL_IDX=${VAL%% *}
if [[ -v KV_CACHE[$VAL_IDX] ]] # Check if tile has been "taken"
@ -67,7 +71,7 @@ do
declare -A KV_CACHE
IFS=':'; while read -r VAR1 VAR2
do
printf "VAR1: %s VAR2: %s\n" "$VAR1" "$VAR2" >&2
#printf "VAR1: %s VAR2: %s\n" "$VAR1" "$VAR2" >&2
KV_CACHE[$VAR1]=$VAR2
done <<< "$(
# Find all adjacent tiles
@ -95,9 +99,9 @@ do
do
CHAR=${CH%% *} # Remove trailing whitespace
if ! [[ -v KV_CACHE[$CHAR] ]]; then continue; fi
MAX_PERI=4
PERI_NUM=0
PERI_NUM=4 # Number of perimeters of a square
AREA=0
ROW=0
check_and_unset "$CHAR"
printf "char: %s max: %s peri: %s area: %s\n" "$CHAR" "$MAX_PERI" "$PERI_NUM" "$AREA" >&2
printf "%s\n" "$(( PERI_NUM * AREA ))"