Day 1

d01.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+sum=0
+while read line; do
+    num1="$(echo "$line" | sed -n 's/^[^0-9]*\([0-9]\).*/\1/p')"
+    num2="$(echo "$line" | sed -n 's/.*\([0-9]\)[^0-9]*$/\1/p')"
+    sum=$(( $sum + $num1$num2 ))
+done < d01_input.txt
+echo "$sum"
+
+sum=0
+while read line; do
+    line1="$(echo "$line" | sed \
+        -e 's/\(one\|two\|three\|four\|five\|six\|seven\|eight\|nine\)/%\1%/' \
+        -e 's/%one%/1/' \
+        -e 's/%two%/2/' \
+        -e 's/%three%/3/' \
+        -e 's/%four%/4/' \
+        -e 's/%five%/5/' \
+        -e 's/%six%/6/' \
+        -e 's/%seven%/7/' \
+        -e 's/%eight%/8/' \
+        -e 's/%nine%/9/')"
+    line2="$(echo "$line" | sed \
+        -e 's/.*\(one\|two\|three\|four\|five\|six\|seven\|eight\|nine\)/%\1%/' \
+        -e 's/%one%/1/' \
+        -e 's/%two%/2/' \
+        -e 's/%three%/3/' \
+        -e 's/%four%/4/' \
+        -e 's/%five%/5/' \
+        -e 's/%six%/6/' \
+        -e 's/%seven%/7/' \
+        -e 's/%eight%/8/' \
+        -e 's/%nine%/9/')"
+    num1="$(echo "$line1" | sed -n 's/^[^0-9]*\([0-9]\).*/\1/p')"
+    num2="$(echo "$line2" | sed -n 's/.*\([0-9]\)[^0-9]*$/\1/p')"
+    sum=$(( $sum + $num1$num2 ))
+done < d01_input.txt
+echo "$sum"