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2022 day 12 Bash final version

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Bruno Raoult
2022-12-22 21:38:26 +01:00
parent 6d4a8dd85b
commit efe0dec8f0
2 changed files with 15 additions and 55 deletions
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14
2022/RESULTS.txt
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@@ -251,3 +251,17 @@ aoc.bash: res=13119526120
aoc-c: res=13119526120
time: 0:00.01 real, 0.01 user, 0.00 sys
context-switch: 13+1, page-faults: 0+87
=========================================
================= day12 =================
=========================================
+++++++++++++++++ part 1
aoc.bash: res=408
time: 0:00.81 real, 0.80 user, 0.00 sys
context-switch: 223+1, page-faults: 0+486
+++++++++++++++++ part 2
aoc.bash: res=399
time: 0:00.57 real, 0.56 user, 0.00 sys
context-switch: 35+1, page-faults: 0+459

56
2022/day12/aoc.bash
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@@ -42,54 +42,34 @@ printvis() {
push1() { # push part 1
local -i _d="$1" _x="$2" _y="$3" _h="$4"
local _c="$_x,$_y"
printf "push d=%d x=%d y=%d h=%d nh=%d... " "$_d" "$_x" "$_y" "$_h" \
"${map[$_c]}"
if (( !visited[$_c] && map[$_c] <= (_h + 1) )); then
(( _d++ ))
visited["$_c"]=$_d
queue+=("$_d:$_c")
echo "$_d:$_c" pushed.
else
echo not pushed.
fi
#local str="$_d:$_x-$_y"
#queue+=("$1")
}
push2() { # push part 2
local -i _d="$1" _x="$2" _y="$3" _h="$4"
local _c="$_x,$_y"
printf "push d=%d x=%d y=%d h=%d nh=%d... " "$_d" "$_x" "$_y" "$_h" \
"${map[$_c]}"
if (( !visited[$_c] && map[$_c] >= (_h - 1) )); then
(( _d++ ))
visited["$_c"]=$_d
queue+=("$_d:$_c")
echo "$_d:$_c" pushed.
else
echo not pushed.
fi
#local str="$_d:$_x-$_y"
#queue+=("$1")
}
pop() {
local -n _d="$1" _x="$2" _y="$3"
local head
((!${#queue[@]})) && echo pop: queue empty. && return 1
((!${#queue[@]})) && echo pop: queue empty. && exit 1
head="${queue[0]}"
#echo "Q=${#queue[@]}=${queue[*]} head=$head"
# shellcheck disable=2034
printf "pop: %s\t" "$head"
_d=${head%:*}
# shellcheck disable=2034
head=${head#*:}
_x=${head%,*}
_y=${head#*,}
unset 'queue[0]'
queue=("${queue[@]}")
printf "pop: d=%d x=%d y=%d remain=%d\n" "$_d" "$_x" "$_y" "${#queue[@]}"
#echo "Q=${#queue[@]}=${queue[*]} head=$head"
return 0
}
@@ -98,7 +78,6 @@ init() {
declare -i i=1
for c in {a..z}; do
(( height[$c] = i++ ))
#echo
done
height[S]=1
height[E]=26
@@ -115,53 +94,36 @@ parse() {
readarray -t _map
X=${#_map[0]}
Y=${#_map[@]}
echo "X=$X Y=$Y"
# create array map[x,y]
for (( y = 0; y < Y; ++y )); do
for (( x = 0; x < X; ++x )); do
c=${_map[$y]:x:1}
# printf "y=%d x=%d c=%s h=%d " "$y" "$x" "$c" "${height[$c]}"
map["$x,$y"]=${height[$c]}
# printf "M=%s\n" "${map["$x,$y"]}"
case "$c" in
S) start="$x,$y"
((part == 1)) && $push 0 "$x" "$y" 1
#printf "\tstart\n"
;;
E) end="$x,$y"
((part == 2)) && $push 0 "$x" "$y" 1
#printf "\tend\n"
;;
esac
done
done
printf "start=%s end=%s\n" "$start" "$end"
printmap
}
solve() {
#local depth coord
local -i h d x y
#push 0 ${start%-*} ${start#*-} 1
#push "11:46-55"
while pop d x y; do
(( h=${map["$x,$y"]} ))
if [[ $part == 1 ]]; then
if [[ "$x,$y" == "$end" ]]; then
res=$((d-1))
printmap
echo
printvis
return
fi
else
if [[ "${map["$x,$y"]}" == 1 ]]; then
res=$((d-1))
printmap
echo
printvis
return
fi
fi
@@ -177,23 +139,7 @@ solve() {
if ((x > 0)); then # west
$push "$d" "$((x-1))" "$y" "$h"
fi
#echo "d=$d x=$x y=$y"
echo
done
#push "10:45-54"
# push "11:46-55"
# pop dep x y
# echo "d=$d x=$x y=$y"
# pop dep x y
# echo "d=$d x=$x y=$y"
# push "78:1-2"
# pop dep x y
# echo "d=$d x=$x y=$y"
# #pop d c
# #echo "d=$d c=$c"
# :
# #(( part == 2 )) && (( _loops = 10000, divisor = 1 ))
}
main "$@"