re-organise repo

2022/go/day01/day01.go

@@ -0,0 +1,44 @@
+package day01
+
+import (
+	"sort"
+	"strings"
+
+	"adventofcode2022/utils"
+)
+
+type elf struct {
+	calories int
+}
+
+func Part1(input string) int {
+	elves := common(input)
+	return elves[0].calories
+}
+
+func Part2(input string) int {
+	elves := common(input)
+	return elves[0].calories + elves[1].calories + elves[2].calories
+}
+
+func common(input string) []elf {
+	lines := strings.Split(input, "\n")
+
+	elves := []elf{}
+	e := elf{}
+	for _, line := range lines {
+		if line == "" {
+			elves = append(elves, e)
+			e = elf{}
+		} else {
+			e.calories += utils.MustAtoi(line)
+		}
+	}
+	elves = append(elves, e)
+
+	sort.Slice(elves, func(i, j int) bool {
+		return elves[i].calories > elves[j].calories
+	})
+
+	return elves
+}