Day 22

22/01.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+declare -A cores
+for ((i=-50;i<=50;i++)); do
+  for ((j=-50;j<=50;j++)); do
+    for ((k=-50;k<=50;k++)); do
+      cores[$i,$j,$k]=0
+    done
+  done
+done
+
+while read line; do
+  if [[ ${line:0:2} == "on" ]]; then
+    new_value=1
+  else
+    new_value=0
+  fi
+  t=${line#*x=}
+  t=${t%%,*}
+  x_1=${t%\.\.*}
+  x_2=${t#*\.\.}
+  t=${line#*y=}
+  t=${t%%,*}
+  y_1=${t%\.\.*}
+  y_2=${t#*\.\.}
+  t=${line#*z=}
+  t=${t%%,*}
+  z_1=${t%\.\.*}
+  z_2=${t#*\.\.}
+
+  if [ $x_1 -lt -50 ] || [ $x_2 -gt 50 ] || [ $y_1 -lt -50 ] || [ $y_2 -gt 50 ] \
+          || [ $z_1 -lt -50 ] || [ $z_2 -gt 50 ]; then
+    continue
+  fi
+
+  for ((x=x_1;x<=x_2;x++)); do
+    for ((y=y_1;y<=y_2;y++)); do
+      for ((z=z_1;z<=z_2;z++)); do
+        cores[$x,$y,$z]=$new_value
+      done
+    done
+  done
+done
+
+echo $(( $(sed 's/ /+/g' <<< ${cores[@]}) ))

22/02.sh

@@ -0,0 +1,106 @@
+#!/bin/bash
+
+declare -A cores
+
+while read line; do
+  if [[ ${line:0:2} == "on" ]]; then
+    new_value=1
+  else
+    new_value=0
+  fi
+  t=${line#*x=}
+  t=${t%%,*}
+  x_1=${t%\.\.*}
+  x_2=${t#*\.\.}
+  t=${line#*y=}
+  t=${t%%,*}
+  y_1=${t%\.\.*}
+  y_2=${t#*\.\.}
+  t=${line#*z=}
+  t=${t%%,*}
+  z_1=${t%\.\.*}
+  z_2=${t#*\.\.}
+
+  for core in ${!cores[@]}; do
+    coords=( ${core//,/ } )
+    if [ $x_1 -gt ${coords[0]} ]; then
+      overlap_x_1=$x_1
+    else
+      overlap_x_1=${coords[0]}
+    fi
+    if [ $x_2 -gt ${coords[1]} ]; then
+      overlap_x_2=${coords[1]}
+    else
+      overlap_x_2=$x_2
+    fi
+    if [ $y_1 -gt ${coords[2]} ]; then
+      overlap_y_1=$y_1
+    else
+      overlap_y_1=${coords[2]}
+    fi
+    if [ $y_2 -gt ${coords[3]} ]; then
+      overlap_y_2=${coords[3]}
+    else
+      overlap_y_2=$y_2
+    fi
+    if [ $z_1 -gt ${coords[4]} ]; then
+      overlap_z_1=$z_1
+    else
+      overlap_z_1=${coords[4]}
+    fi
+    if [ $z_2 -gt ${coords[5]} ]; then
+      overlap_z_2=${coords[5]}
+    else
+      overlap_z_2=$z_2
+    fi
+    if [ $overlap_x_2 -ge $overlap_x_1 ] && [ $overlap_y_2 -ge $overlap_y_1 ] \
+            && [ $overlap_z_2 -ge $overlap_z_1 ]; then
+      if [ ${coords[0]} -lt $overlap_x_1 ]; then
+        cores[${coords[0]},$((overlap_x_1-1)),${coords[2]},${coords[3]},${coords[4]},${coords[5]}]=1
+      fi
+      if [ ${coords[1]} -gt $overlap_x_2 ]; then
+        cores[$((overlap_x_2+1)),${coords[1]},${coords[2]},${coords[3]},${coords[4]},${coords[5]}]=1
+      fi
+      if [ ${coords[2]} -lt $overlap_y_1 ]; then
+        cores[$overlap_x_1,$overlap_x_2,${coords[2]},$((overlap_y_1-1)),${coords[4]},${coords[5]}]=1
+      fi
+      if [ ${coords[3]} -gt $overlap_y_2 ]; then
+        cores[$overlap_x_1,$overlap_x_2,$((overlap_y_2+1)),${coords[3]},${coords[4]},${coords[5]}]=1
+      fi
+      if [ ${coords[4]} -lt $overlap_z_1 ]; then
+        cores[$overlap_x_1,$overlap_x_2,$overlap_y_1,$overlap_y_2,${coords[4]},$((overlap_z_1-1))]=1
+      fi
+      if [ ${coords[5]} -gt $overlap_z_2 ]; then
+        cores[$overlap_x_1,$overlap_x_2,$overlap_y_1,$overlap_y_2,$((overlap_z_2+1)),${coords[5]}]=1
+      fi
+      unset cores[$core]
+    fi
+  done
+
+  if [ $new_value -eq 1 ]; then
+    cores[$x_1,$x_2,$y_1,$y_2,$z_1,$z_2]=$new_value
+  fi
+done
+
+n_cores_on=0
+for core in ${!cores[@]}; do
+  coords=( ${core//,/ } )
+  x=$((coords[1]-coords[0]))
+  if [ $x -lt 0 ]; then
+    x=${x#-}
+  fi
+  y=$((coords[3]-coords[2]))
+  if [ $y -lt 0 ]; then
+    y=${y#-}
+  fi
+  z=$((coords[5]-coords[4]))
+  if [ $z -lt 0 ]; then
+    z=${z#-}
+  fi
+  x=$((x+1))
+  y=$((y+1))
+  z=$((z+1))
+  n_cores_on=$((n_cores_on+x*y*z*${cores[$core]}))
+done
+
+echo $n_cores_on