72 lines
1.2 KiB
Bash
Executable File
72 lines
1.2 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# ex1.bash: Advent2020 game, day 17/game 1.
|
|
|
|
CMD=${0##*/}
|
|
#shopt -s extglob
|
|
|
|
declare -A life=()
|
|
declare -i x=-1 y=-1 z=-1 res=0
|
|
declare -i loops=6
|
|
|
|
function run_cycle () {
|
|
local -i x y z count=0 x1 y1 z1 v
|
|
local -A lifetmp=()
|
|
local -a values
|
|
|
|
|
|
for k in "${!life[@]}"; do
|
|
# shellcheck disable=SC2206
|
|
values=(${k//-/ })
|
|
x=${values[0]}
|
|
y=${values[1]}
|
|
z=${values[2]}
|
|
|
|
for ((x1=x-1; x1<x+2; ++x1)); do
|
|
for ((y1=y-1; y1<y+2; ++y1)); do
|
|
for ((z1=z-1; z1<z+2; ++z1)); do
|
|
if ((x1!=x || y1!=y || z1!=z)); then
|
|
((++lifetmp[$x1-$y1-$z1]))
|
|
fi
|
|
done
|
|
done
|
|
done
|
|
done
|
|
|
|
# clean elements with no neighbors
|
|
for k in "${!life[@]}"; do
|
|
if [[ ! -v lifetmp[$k] ]]; then
|
|
unset "life[$k]"
|
|
fi
|
|
done
|
|
for k in "${!lifetmp[@]}"; do
|
|
v=${lifetmp[$k]}
|
|
|
|
if [[ -v life[$k] ]]; then
|
|
(( v!=2 && v!=3 )) && unset "life[$k]"
|
|
else
|
|
(( v==3 )) && life[$k]="#"
|
|
fi
|
|
done
|
|
}
|
|
|
|
x=$loops; y=$loops; z=$loops
|
|
while read -r line; do
|
|
for ((j=0; j<${#line}; ++j)); do
|
|
((curx=x+j))
|
|
c=${line:j:1}
|
|
if [[ $c == "#" ]]; then
|
|
life[$curx-$y-$z]=$c
|
|
fi
|
|
done
|
|
((y++))
|
|
done
|
|
for ((i=0; i<6; ++i)); do
|
|
run_cycle
|
|
done
|
|
res=${#life[@]}
|
|
|
|
printf "%s : res=%d\n" "$CMD" "$res"
|
|
|
|
exit 0
|