2022 Days 1 - 6

Adding days 1-6 for 2022, including my input.

Author: liamgallear

2022/D1/caloriecounting.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+"flag"
+"fmt"
+"sort"
+"strings"
+"time"
+
+"github.com/Galzzly/adventofcode/utilities"
+)
+
+/*
+Read in the input file, and parse it using the utility function to split the data into
+useable slices.
+Use the countCalories function to calculate the colories that each elf is carrying, and
+reverse sort the results to allow for quicker processing afterwards.
+Part 1 requires the total amount of calories being carried by the elf carrying the most.
+Part 2 requires the total amount of calories being carried by the top three elves.
+*/
+
+func main() {
+start := time.Now()
+var file string
+flag.StringVar(&file, "input", "input.txt", "")
+flag.Parse()
+
+elves := utilities.ReadFile(file, func(f string) [][]string {
+res := [][]string{}
+for _, line := range strings.Split(strings.TrimSpace(f), "\n\n") {
+res = append(res, strings.Split(line, "\n"))
+}
+return res
+})
+
+calories := countCalories(elves)
+t1 := time.Now()
+fmt.Println("Part 1:", calories[0], "- Took:", time.Since(t1))
+t2 := time.Now()
+fmt.Println("Part 2:", utilities.SumArray(calories[:3]), "- Took:", time.Since(t2))
+fmt.Println("Total time:", time.Since(start))
+}
+
+func countCalories(elves [][]string) (res []int) {
+res = make([]int, len(elves))
+for i := range elves {
+for _, c := range elves[i] {
+res[i] += utilities.Atoi(c)
+}
+}
+sort.Sort(sort.Reverse(sort.IntSlice(res)))
+return
+}