Big update: Adding all advent of codes to same repo

AdventOfCode2015/day6/day6.go

@@ -0,0 +1,130 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"strconv"
+	"time"
+)
+
+type Square struct {
+	x int64
+	y int64
+}
+
+func main() {
+
+	fmt.Println("Day 6")
+	start := time.Now()
+
+	dat, err := ioutil.ReadFile("day6.txt")
+	if err != nil {
+		panic(err)
+	}
+
+	lines := bytes.Split(dat, []byte("\n"))
+	lights := make(map[Square]bool)
+	lights2 := make(map[Square]int64)
+
+	SwitchTheLights(lights, false, false, 0, 0, 1000, 1000)
+
+	part1 := 0
+	var part2 int64 = 0
+
+	for _, value := range lines {
+
+		words := bytes.Split(value, []byte(" "))
+		if len(words) == 4 {
+
+			start := bytes.Split(words[1], []byte(","))
+			end := bytes.Split(words[3], []byte(","))
+
+			startX, _ := strconv.Atoi(string(start[0]))
+			startY, _ := strconv.Atoi(string(start[1]))
+			endX, _ := strconv.Atoi(string(end[0]))
+			endY, _ := strconv.Atoi(string(end[1]))
+
+			SwitchTheLights(lights, false, true, int64(startX), int64(startY), int64(endX), int64(endY))
+			SwitchTheLights2(lights2, false, true, int64(startX), int64(startY), int64(endX), int64(endY))
+
+		} else {
+
+			start := bytes.Split(words[2], []byte(","))
+			end := bytes.Split(words[4], []byte(","))
+
+			startX, _ := strconv.Atoi(string(start[0]))
+			startY, _ := strconv.Atoi(string(start[1]))
+			endX, _ := strconv.Atoi(string(end[0]))
+			endY, _ := strconv.Atoi(string(end[1]))
+
+			SwitchTheLights(lights, compare(words[1], []byte("on")), false, int64(startX), int64(startY), int64(endX), int64(endY))
+			SwitchTheLights2(lights2, compare(words[1], []byte("on")), false, int64(startX), int64(startY), int64(endX), int64(endY))
+
+		}
+
+	}
+
+	for _, v := range lights {
+		if v {
+			part1++
+		}
+	}
+
+	for _, v := range lights2 {
+		part2 += v
+	}
+
+	elapsed := time.Since(start)
+	fmt.Printf("Part 1: %v %v \n", part1, elapsed)
+	fmt.Printf("Part 2: %v %v \n", part2, elapsed)
+
+}
+
+func SwitchTheLights(lights map[Square]bool, state bool, toggle bool, startX int64, startY int64, endX int64, endY int64) {
+
+	for i := startX; i <= endX; i++ {
+		for j := startY; j <= endY; j++ {
+			if toggle {
+				lights[Square{x: i, y: j}] = !lights[Square{x: i, y: j}]
+			} else {
+				lights[Square{x: i, y: j}] = state
+			}
+		}
+	}
+
+}
+
+func SwitchTheLights2(lights map[Square]int64, state bool, toggle bool, startX int64, startY int64, endX int64, endY int64) {
+
+	for i := startX; i <= endX; i++ {
+		for j := startY; j <= endY; j++ {
+
+			var brighness int64 = lights[Square{x: i, y: j}]
+			if toggle {
+				lights[Square{x: i, y: j}] = brighness + 2
+			} else {
+
+				if state {
+					lights[Square{x: i, y: j}] = brighness + 1
+				} else {
+					lights[Square{x: i, y: j}] = brighness - 1
+					if lights[Square{x: i, y: j}] < 0 {
+						lights[Square{x: i, y: j}] = 0
+					}
+				}
+
+			}
+		}
+	}
+
+}
+
+func compare(slice1 []byte, slice2 []byte) bool {
+	for i := 0; i < len(slice1) && i < len(slice2); i++ {
+		if slice1[i] != slice2[i] {
+			return false
+		}
+	}
+	return true
+}