Day 16 solution.

2020/lib/util/strings.go

@@ -1,5 +1,10 @@
 package util
 
+import (
+	"log"
+	"strconv"
+)
+
 // Takes a slice of strings as from reading each line in a file.
 // Concatenates strings, creating new ones when blank lines are encountered
 // NB: adds a single space to the beginning of each concatenated line.
@@ -19,3 +24,11 @@ func SplitOnBlankLine(input []string) []string {
 
 	return converted
 }
+
+func MustAtoi(input string) int {
+	ret, err := strconv.Atoi(input)
+	if err != nil {
+		log.Panicf(err.Error())
+	}
+	return ret
+}