feat(2017): refactor day 6

Refactored Day 6 of 2017 to use the common framework. Successfully migrated solution and integrated it into the runner.

Author: markkovari

2017/days/6/day06.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/markkovari/advent_of_code/aoc-go-common"
+)
+
+type Day06 struct{}
+
+func (d Day06) Part1(input string) string {
+	banks := parse(input)
+	seen := make(map[[16]int]int)
+	cycles := 0
+	for {
+		if _, ok := seen[banks]; ok {
+			return fmt.Sprintf("%d", cycles)
+		}
+		seen[banks] = cycles
+		
+		maxIdx, maxVal := 0, banks[0]
+		for i, val := range banks {
+			if val > maxVal {
+				maxIdx, maxVal = i, val
+			}
+		}
+
+		banks[maxIdx] = 0
+		for i := 1; i <= maxVal; i++ {
+			banks[(maxIdx+i)%16]++
+		}
+		cycles++
+	}
+}
+
+func (d Day06) Part2(input string) string {
+	banks := parse(input)
+	seen := make(map[[16]int]int)
+	cycles := 0
+	for {
+		if firstSeen, ok := seen[banks]; ok {
+			return fmt.Sprintf("%d", cycles-firstSeen)
+		}
+		seen[banks] = cycles
+		
+		maxIdx, maxVal := 0, banks[0]
+		for i, val := range banks {
+			if val > maxVal {
+				maxIdx, maxVal = i, val
+			}
+		}
+
+		banks[maxIdx] = 0
+		for i := 1; i <= maxVal; i++ {
+			banks[(maxIdx+i)%16]++
+		}
+		cycles++
+	}
+}
+
+func parse(input string) [16]int {
+	var banks [16]int
+	for i, s := range strings.Fields(input) {
+		fmt.Sscanf(s, "%d", &banks[i])
+	}
+	return banks
+}
+
+func main() {
+	common.Run(2017, 6, Day06{})
+}

2017/inputs/6/prod.txt

@@ -0,0 +1 @@
+0	5	10	0	11	14	13	4	11	8	8	7	1	4	12	11

2017/inputs/6/test.txt

@@ -0,0 +1 @@
+0   2   7   0