re-organise repo

2022/go/day08/day08.go

@@ -0,0 +1,89 @@
+package day08
+
+import (
+	_ "fmt"
+
+	"adventofcode2022/utils"
+	"adventofcode2022/utils/inputs"
+	"adventofcode2022/utils/grid2d"
+)
+
+func Part1(input string) int {
+	grid := inputs.ToGrid2D(input, "\n", "", -1, utils.MustAtoi)
+	visible := grid2d.NewGrid(grid.SizeX(), grid.SizeY(), false)
+
+	for j := 0; j < grid.SizeY(); j++ {
+		for i := 0; i < grid.SizeX(); i++ {
+			directions := [][]int{{0, 1}, {0, -1}, {1, 0}, {-1, 0}}
+			for _, dir := range directions {
+				v := true
+				x := i
+				y := j
+				for {
+					x += dir[0]
+					y += dir[1]
+					if x < 0 || x >= grid.SizeX() || y < 0 || y >= grid.SizeY() {
+						break
+					}
+					if grid.Get(i, j) <= grid.Get(x, y) {
+						v = false
+						break
+					}
+				}
+				if v {
+					visible.Set(i, j, true)
+					break
+				}
+			}
+		}
+	}
+
+	sum := 0
+	for j := 0; j < visible.SizeY(); j++ {
+		for i := 0; i < visible.SizeX(); i++ {
+			if visible.Get(i, j) {
+				sum++
+			}
+		}
+	}
+	return sum
+}
+
+func Part2(input string) int {
+	grid := inputs.ToGrid2D(input, "\n", "", -1, utils.MustAtoi)
+	scenicScore := grid2d.NewGrid(grid.SizeX(), grid.SizeY(), 1)
+
+	for j := 0; j < grid.SizeY(); j++ {
+		for i := 0; i < grid.SizeX(); i++ {
+			directions := [][]int{{0, 1}, {0, -1}, {1, 0}, {-1, 0}}
+			for _, dir := range directions {
+				score := 0
+				x := i
+				y := j
+				for {
+					x += dir[0]
+					y += dir[1]
+					if x < 0 || x >= grid.SizeX() || y < 0 || y >= grid.SizeY() {
+						break
+					}
+					if grid.Get(i, j) <= grid.Get(x, y) {
+						score++
+						break
+					}
+					score++
+				}
+				scenicScore.Set(i, j, scenicScore.Get(i,j) * score)
+				}
+		}
+	}
+	
+	max := 0
+	for j := 0; j < scenicScore.SizeY(); j++ {
+		for i := 0; i < scenicScore.SizeX(); i++ {
+			if scenicScore.Get(i, j) > max {
+				max = scenicScore.Get(i, j)
+			}
+		}
+	}
+	return max
+}