day 1

.gitignore

@@ -0,0 +1 @@
+input

day1/day1.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+
+replacedigits() {
+	rep="$1"
+	i="0"
+	len="${#rep}"
+	ret=""
+	while [ $i -lt ${len} ]; do
+		case "${rep:${i}:1}" in
+			0|1|2|3|4|5|6|7|8|9)
+				ret="${ret}${rep:${i}:1}"
+				i=$((i+1))
+				continue
+				;;
+		esac
+		#echo ${i} ${rep} ${rep:${i}:1}
+		#echo ${rep:${i}:3} ${rep:${i}:4} ${rep:${i}:5} 
+		if [ ${rep:${i}:3} = one ]; then
+			ret="${ret}1"
+		elif [ ${rep:${i}:3} = two ]; then
+			ret="${ret}2"
+		elif [ ${rep:${i}:5} = three ]; then
+			ret="${ret}3"
+		elif [ ${rep:${i}:4} = four ]; then
+			ret="${ret}4"
+		elif [ ${rep:${i}:4} = five ]; then
+			ret="${ret}5"
+		elif [ ${rep:${i}:3} = six ]; then
+			ret="${ret}6"
+		elif [ ${rep:${i}:5} = seven ]; then
+			ret="${ret}7"
+		elif [ ${rep:${i}:5} = eight ]; then
+			ret="${ret}8"
+		elif [ ${rep:${i}:4} = nine ]; then
+			ret="${ret}9"
+		fi
+		i="$((i+1))"
+	done
+	echo "$ret"
+}
+
+sum=0;
+for number in $(cat "$1" | sed s/[^0-9]//g); do
+	sum=$((sum+${number:0:1}*10+${number:${#number}-1:${#number}}))
+done
+printf "part 1: %d\n" $sum
+
+sum=0;
+for line in $(cat "$1"); do
+	number="$(replacedigits $line)"
+	digits="$((10*${number:0:1}+${number:$((${#number}-1)):${#number}}))"
+	#printf "%s %s %s\n" $line $number $digits
+	sum=$((sum+${digits}))
+done
+printf "part 2: %d\n" $sum