AoC 2020: day4

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

2018/day_06/input

@@ -1,50 +0,0 @@
-81, 46
-330, 289
-171, 261
-248, 97
-142, 265
-139, 293
-309, 208
-315, 92
-72, 206
-59, 288
-95, 314
-126, 215
-240, 177
-78, 64
-162, 168
-75, 81
-271, 258
-317, 223
-210, 43
-47, 150
-352, 116
-316, 256
-269, 47
-227, 343
-125, 290
-245, 310
-355, 301
-251, 282
-353, 107
-254, 298
-212, 128
-60, 168
-318, 254
-310, 303
-176, 345
-110, 109
-217, 338
-344, 330
-231, 349
-259, 208
-201, 57
-200, 327
-354, 111
-166, 214
-232, 85
-96, 316
-151, 288
-217, 339
-62, 221
-307, 68

2018/day_06/main.go

@@ -1,133 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"fmt"
-	"log"
-	"math"
-	"os"
-)
-
-type point struct {
-	x  int
-	y  int
-	id int
-}
-
-type grid struct {
-	points      [][]int
-	coordinates []point
-	currentID   int
-	invalidIDs  map[int]bool
-	maxX        int
-	maxY        int
-	minX        int
-	minY        int
-	maxArea     int
-}
-
-func (p1 point) manhattanDistance(p2 point) int {
-	return int(math.Abs(float64(p1.x-p2.x)) + math.Abs(float64(p1.y-p2.y)))
-}
-
-func main() {
-	var currentGrid grid
-
-	file, err := os.Open("./input")
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer file.Close()
-
-	scan := bufio.NewScanner(file)
-	for scan.Scan() {
-		var p point
-
-		line := scan.Text()
-		fmt.Sscanf(line, "%d, %d", &p.x, &p.y)
-		p.id = currentGrid.currentID
-		currentGrid.currentID++
-
-		currentGrid.coordinates = append(currentGrid.coordinates, p)
-
-		if p.x > currentGrid.maxX {
-			currentGrid.maxX = p.x
-		}
-		if p.y > currentGrid.maxY {
-			currentGrid.maxY = p.y
-		}
-		if p.x < currentGrid.minX || currentGrid.minX == 0 {
-			currentGrid.minX = p.x
-		}
-		if p.y < currentGrid.minY || currentGrid.minY == 0 {
-			currentGrid.minY = p.y
-		}
-	}
-
-	currentGrid.points = make([][]int, currentGrid.maxX)
-	for i := range currentGrid.points {
-		currentGrid.points[i] = make([]int, currentGrid.maxY)
-	}
-
-	for x := 0; x < currentGrid.maxX; x++ {
-		for y := 0; y < currentGrid.maxY; y++ {
-			minDist := -1
-			minDistID := -1
-			for i, c := range currentGrid.coordinates {
-				dist := c.manhattanDistance(point{x: x, y: y})
-				if i == 0 {
-					minDist = dist
-					minDistID = c.id
-				} else if dist < minDist {
-					minDist = dist
-					minDistID = c.id
-				} else if dist == minDist {
-					minDistID = -1
-				}
-			}
-			currentGrid.points[x][y] = minDistID
-		}
-	}
-
-	currentGrid.invalidIDs = make(map[int]bool)
-	for x := 0; x < currentGrid.maxX; x++ {
-		currentGrid.invalidIDs[currentGrid.points[x][0]] = true
-		currentGrid.invalidIDs[currentGrid.points[x][currentGrid.maxY-1]] = true
-	}
-	for y := 0; y < currentGrid.maxY; y++ {
-		currentGrid.invalidIDs[currentGrid.points[0][y]] = true
-		currentGrid.invalidIDs[currentGrid.points[currentGrid.maxX-1][y]] = true
-	}
-
-	for id := 0; id < currentGrid.currentID; id++ {
-		count := 0
-		for x := 0; x < currentGrid.maxX; x++ {
-			for y := 0; y < currentGrid.maxY; y++ {
-				if currentGrid.points[x][y] == id {
-					count++
-				}
-			}
-		}
-		if count > currentGrid.maxArea {
-			_, invalidID := currentGrid.invalidIDs[id]
-			if !invalidID {
-				currentGrid.maxArea = count
-			}
-		}
-	}
-	fmt.Printf("Part One: %v\n", currentGrid.maxArea)
-
-	count := 0
-	for x := 0; x < currentGrid.maxX; x++ {
-		for y := 0; y < currentGrid.maxY; y++ {
-			sum := 0
-			for _, c := range currentGrid.coordinates {
-				sum += c.manhattanDistance(point{x: x, y: y})
-			}
-			if sum < 10000 {
-				count++
-			}
-		}
-	}
-	fmt.Printf("Part Two: %v\n", count)
-}