+ day 3, part 1

03/README.md

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+# Day 3
+
+this one is a biiiit cursed
+
+`cat data | ./meow.sh`

03/meow.sh

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+#!/bin/bash
+a=('' a b c d e f g h i j k l m n o p q r s t u v w x y z)
+a+=(A B C D E F G H I J K L M N O P Q R S T U V W X Y Z)
+declare -A meow
+
+for (( i=1; i<${#a[@]}; i++ )); do
+	meow[${a[$i]}]=$i
+done
+
+sum=0
+while read line; do 
+	len=$(echo -n "$line" | wc -c)
+	c1=$(cut -c 1-$((len/2)) <<< "$line")
+	c2=($(cut -c $((len/2+1))-$len <<< "$line" | sed -E 's/./& /g'))
+	c3=""
+
+	for i in ${c2[@]}; do
+		[[ "$c1" == *"$i"* && "$c3" != *"$i"* ]] && sum=$((sum+${meow[$i]}))
+		c3="$c3$i"
+	done
+done
+
+echo $sum