day10

aoclib/aoclib.go

@@ -56,6 +56,25 @@ func (p *Puzzle) GetInputArrayInt() []int {
 	return p.RawInputInt
 }
 
+func (p *Puzzle) GetInput2DArrayInt() [][]int {
+	var ret [][]int
+	for _, v := range p.GetInputArray() {
+		var thisIntLine []int
+		for _, c := range v {
+			value, err := strconv.Atoi(string(c))
+			if err != nil {
+				log.Fatalf("Cannot convert string to int: (%c in %s)", c, v)
+			} else {
+				thisIntLine = append(thisIntLine, value)
+			}
+		}
+
+		ret = append(ret, thisIntLine)
+	}
+
+	return ret
+}
+
 func (p Puzzle) Solve(partFunction func(p Puzzle) interface{}, day int, part int, timeit bool, timeitNumber int) {
 	var result interface{}
 	if !timeit {

day10/day10.go

@@ -0,0 +1,43 @@
+package day10
+
+import (
+	"aoc2015/aoclib"
+)
+
+func lookAndSay(look []int) (say []int) {
+	for index := 0; index < len(look); {
+		firstChar := look[index]
+		nextIndex := index + 1
+		if nextIndex == len(look) {
+			say = append(say, nextIndex-index, firstChar)
+		} else {
+			for len(look) > nextIndex && look[nextIndex] == firstChar {
+				nextIndex++
+			}
+			say = append(say, nextIndex-index, firstChar)
+		}
+		index = nextIndex
+	}
+
+	return say
+}
+
+func Part1(puzzle aoclib.Puzzle) interface{} {
+	look := puzzle.GetInput2DArrayInt()[0]
+
+	for i := 0; i < 40; i++ {
+		look = lookAndSay(look)
+	}
+
+	return len(look)
+}
+
+func Part2(puzzle aoclib.Puzzle) interface{} {
+	look := puzzle.GetInput2DArrayInt()[0]
+
+	for i := 0; i < 50; i++ {
+		look = lookAndSay(look)
+	}
+
+	return len(look)
+}

inputs/10

@@ -0,0 +1 @@
+3113322113

inputs/10_test

@@ -0,0 +1 @@
+1

main.go

@@ -11,6 +11,7 @@ import (
 	"aoc2015/day07"
 	"aoc2015/day08"
 	"aoc2015/day09"
+	"aoc2015/day10"
 	"flag"
 	"fmt"
 	"os"
@@ -54,6 +55,9 @@ func initDayFunctions() {
 	dayFunctions[9] = make(map[int]func(puzzle aoclib.Puzzle) interface{}, 2)
 	dayFunctions[9][1] = day09.Part1
 	dayFunctions[9][2] = day09.Part2
+	dayFunctions[10] = make(map[int]func(puzzle aoclib.Puzzle) interface{}, 2)
+	dayFunctions[10][1] = day10.Part1
+	dayFunctions[10][2] = day10.Part2
 }
 
 func execute(thisDay int) {