Big update: Adding all advent of codes to same repo

AdventOfCode2021/day5/day5.go

@@ -0,0 +1,119 @@
+package day5
+
+import (
+	"math"
+	"strconv"
+	"strings"
+)
+
+type Coord struct {
+	x int
+	y int
+}
+
+type coordPairs struct {
+	point1 Coord
+	point2 Coord
+}
+
+func Run(dat []byte) (int, int) {
+	
+	stringDat := strings.Split(string(dat), "\n")
+
+	coordList := make([]coordPairs, len(stringDat))
+	
+	for i := 0; i < len(stringDat); i++ {
+		
+		coords := strings.Split(stringDat[i], " -> ")
+		
+		firstCoord := strings.Split(coords[0], ",")
+		secondCoord := strings.Split(coords[1], ",")
+		
+		x1, _ := strconv.Atoi(firstCoord[0])
+		y1, _ := strconv.Atoi(firstCoord[1])
+		x2, _ := strconv.Atoi(secondCoord[0])
+		y2, _ := strconv.Atoi(secondCoord[1])
+		
+		coordList[i] = coordPairs{Coord{x: x1, y: y1}, Coord{x: x2, y: y2}}
+
+	}
+
+	coordMap := make(map[Coord]int)
+	part2CoordMap := make(map[Coord]int)
+
+	for _, c := range coordList {
+		if (c.point1.x == c.point2.x) {
+
+			lowY := int(math.Min(float64(c.point1.y), float64(c.point2.y)))
+			highY := int(math.Max(float64(c.point1.y), float64(c.point2.y)))
+
+			for i := lowY; i <= highY; i++ {
+				coordMap[Coord{x: c.point1.x, y: i}] = coordMap[Coord{x: c.point1.x, y: i}] + 1
+				part2CoordMap[Coord{x: c.point1.x, y: i}] = part2CoordMap[Coord{x: c.point1.x, y: i}] + 1
+			}
+
+		} else if (c.point1.y == c.point2.y) {
+				
+			lowX := int(math.Min(float64(c.point1.x), float64(c.point2.x)))
+			highX := int(math.Max(float64(c.point1.x), float64(c.point2.x)))
+
+			for i := lowX; i <= highX; i++ {
+				coordMap[Coord{x: i, y: c.point1.y}] = coordMap[Coord{x: i, y: c.point1.y}] + 1
+				part2CoordMap[Coord{x: i, y: c.point1.y}] = part2CoordMap[Coord{x: i, y: c.point1.y}] + 1
+			}
+
+		} else {
+			
+			if c.point1.x < c.point2.x {
+
+				step := 0
+
+				if c.point1.y - c.point2.y > 0 {
+					step = -1
+				} else {
+					step = 1
+				}
+
+				counter := c.point1.y
+				for i := c.point1.x; i <= c.point2.x; i++ {
+					part2CoordMap[Coord{x: i, y: counter}] = part2CoordMap[Coord{x: i, y: counter}] + 1
+					counter += step
+				}
+			} else {
+
+				step := 0
+
+				if c.point2.y - c.point1.y > 0 {
+					step = -1
+				} else {
+					step = 1
+				}
+
+				counter := c.point2.y
+				for i := c.point2.x; i <= c.point1.x; i++ {
+					part2CoordMap[Coord{x: i, y: counter}] = part2CoordMap[Coord{x: i, y: counter}] + 1
+					counter += step
+				}
+			}
+
+		}
+	}
+
+	part1 := 0
+	part2 := 0
+
+	for _, value := range coordMap {
+		if value > 1 {
+			part1++
+		}
+	}
+
+	for _, value := range part2CoordMap {
+		if value > 1 {
+			part2++
+		}
+	}
+
+	return part1, part2
+
+}