Day 6

06/01.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+read line
+
+anglerfishes=( ${line//,/ } )
+for i in $(seq 80); do
+  new_anglerfishes=()
+  for j in $(seq ${#anglerfishes[@]}); do
+    if [ ${anglerfishes[$((j-1))]} -eq 0 ]; then
+      anglerfishes[$((j-1))]=7
+      new_anglerfishes+=( 8 )
+    fi
+    anglerfishes[$((j-1))]=$((anglerfishes[j-1]-1))
+  done
+  anglerfishes+=("${new_anglerfishes[@]}")
+done
+echo ${#anglerfishes[@]}

06/02.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+read line
+
+anglerfishes=( ${line//,/ } )
+new_anglerfishes=(0 0 0 0 0 0 0 0 0)
+for i in $(seq ${#anglerfishes[@]}); do
+  new_anglerfishes[${anglerfishes[$((i-1))]}]=$((new_anglerfishes[anglerfishes[i-1]]+1))
+done
+anglerfishes=( "${new_anglerfishes[@]}" )
+for i in $(seq 256); do
+  new_anglerfishes=(0 0 0 0 0 0 0 0 0)
+  for j in $(seq 2 9); do
+    new_anglerfishes[$((j-2))]=${anglerfishes[$((j-1))]}
+  done
+  new_anglerfishes[6]=$((anglerfishes[0]+new_anglerfishes[6]))
+  new_anglerfishes[8]=$((anglerfishes[0]+new_anglerfishes[8]))
+  anglerfishes=( "${new_anglerfishes[@]}" )
+done
+total_anglerfishes=$(sed 's/ /+/g' <<< "${anglerfishes[@]}")
+echo $((total_anglerfishes))