87 lines
1.5 KiB
Bash
Executable File
87 lines
1.5 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 maxx maxy maxz
|
|
|
|
function count_neighbors () {
|
|
local -i x=$1 y=$2 z=$3 x1 y1 z1 count=0
|
|
local str=""
|
|
|
|
|
|
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
|
|
if [[ ${life[$x1-$y1-$z1]} == "#" ]]; then
|
|
((count++))
|
|
str="$str $x1-$y1-$z1"
|
|
fi
|
|
|
|
fi
|
|
done
|
|
done
|
|
done
|
|
echo "$count"
|
|
}
|
|
|
|
function run_cycle () {
|
|
local -i x y z count=0
|
|
local -A lifetmp=()
|
|
|
|
for ((x=0; x<maxx; ++x)); do
|
|
for ((y=0; y<maxy; ++y)); do
|
|
for ((z=0; z<maxz; ++z)); do
|
|
count=$(count_neighbors "$x" "$y" "$z")
|
|
if [[ ${life[$x-$y-$z]} == "#" ]]; then
|
|
((count!=2 && count!=3)) && lifetmp[$x-$y-$z]="."
|
|
else
|
|
((count==3)) && lifetmp[$x-$y-$z]="#"
|
|
fi
|
|
done
|
|
done
|
|
done
|
|
for k in "${!lifetmp[@]}"; do
|
|
life[$k]=${lifetmp[$k]}
|
|
done
|
|
}
|
|
|
|
function count_active () {
|
|
local k
|
|
local -i count=0
|
|
|
|
for k in "${!life[@]}"; do
|
|
if [[ ${life[$k]} == "#" ]]; then
|
|
((count++))
|
|
fi
|
|
done
|
|
echo "$count"
|
|
}
|
|
|
|
x=6; y=6; z=6
|
|
while read -r line; do
|
|
if ((y==6)); then # 1st line
|
|
((maxx=6+${#line}+6+1))
|
|
((maxy=maxx))
|
|
((maxz=maxx))
|
|
fi
|
|
for ((j=0; j<${#line}; ++j)); do
|
|
((curx=x+j))
|
|
life[$curx-$y-$z]=${line:j:1}
|
|
done
|
|
((y++))
|
|
done
|
|
for ((i=0; i<6; ++i)); do
|
|
run_cycle
|
|
done
|
|
res=$(count_active)
|
|
|
|
printf "%s : res=%d\n" "$CMD" "$res"
|
|
|
|
exit 0
|