Add solution to day 2.

In bash, for a change.

2017/day-02/solution.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+sum1=0
+sum2=0
+
+while IFS="\n" read line; do
+	sorted=$(echo $line | xargs -n 1 echo | sort -n)
+	checksum=$(($(echo "$sorted" | tail -n 1) - $(echo "$sorted" | head -n 1)))
+
+	for a in $sorted; do
+		for b in $sorted; do
+			if [[ $a -le $b ]]; then
+				continue
+			fi
+
+			if [[ $((a % b)) -eq 0 ]]; then
+				sum2=$((sum2 + a / b))
+				break
+			fi
+		done
+	done
+
+	sum1=$((sum1 + checksum))
+done
+
+echo Sum 1: $sum1
+echo Sum 2: $sum2