feat(2017): refactor day 5

Refactored Day 5 of 2017 to use the common framework. Successfully migrated solution and integrated it into the runner.

Author: markkovari

2017/days/5/day05.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/markkovari/advent_of_code/aoc-go-common"
+)
+
+type Day05 struct{}
+
+func (d Day05) Part1(input string) string {
+	jumps := parse(input)
+	current, steps := 0, 0
+	for current >= 0 && current < len(jumps) {
+		jump := jumps[current]
+		jumps[current]++
+		current += jump
+		steps++
+	}
+	return fmt.Sprintf("%d", steps)
+}
+
+func (d Day05) Part2(input string) string {
+	jumps := parse(input)
+	current, steps := 0, 0
+	for current >= 0 && current < len(jumps) {
+		jump := jumps[current]
+		if jump >= 3 {
+			jumps[current]--
+		} else {
+			jumps[current]++
+		}
+		current += jump
+		steps++
+	}
+	return fmt.Sprintf("%d", steps)
+}
+
+func parse(input string) []int {
+	var nums []int
+	for _, line := range strings.Split(input, "\n") {
+		if line == "" { continue }
+		val, _ := strconv.Atoi(line)
+		nums = append(nums, val)
+	}
+	return nums
+}
+
+func main() {
+	common.Run(2017, 5, Day05{})
+}