advent2022

commit f23ede1b9a424b85bf48bccb95ed15399a2cb27a
parent 6bf87ae41fc0411df5cf2016c74b5fe63efc90c5
Author: bsandro <email@bsandro.tech>
Date:   Wed, 14 Dec 2022 09:34:35 +0000

Day 14 part 1

Diffstat:
M
day14/main.go
 | 
32
++++++++++++++++++++++++++++++--

1 file changed, 30 insertions(+), 2 deletions(-)
diff --git a/day14/main.go b/day14/main.go
@@ -65,7 +65,7 @@ func (grid Grid) String() string {
 			case 1:
 				s += "#"
 			case 2:
-				s += "O"
+				s += "o"
 			default:
 				s += " "
 			}
@@ -148,11 +148,39 @@ func day14(input_file string) {
 
 	height := shapes.GetMaxY() + 1
 	offsetX := shapes.GetMinX()
-	width := shapes.GetMaxX() - offsetX + 1
+	width := shapes.GetMaxX() - offsetX + 2
 	var grid Grid
 	grid.Init(width, height)
 	for _, s := range shapes {
 		grid.AddShape(s, offsetX)
 	}
 	fmt.Printf("%v\n", grid)
+
+	i := 0
+	for {
+		p := Pos{x: 500 - offsetX, y: 1}
+		for p.x > 0 && p.x < width-1 && p.y < height-1 {
+			if grid[p.y+1][p.x] == 0 {
+				p.y += 1
+			} else if grid[p.y+1][p.x-1] == 0 {
+				p.y += 1
+				p.x -= 1
+			} else if grid[p.y+1][p.x+1] == 0 {
+				p.y += 1
+				p.x += 1
+			} else {
+				//log.Fatal("invalid point")
+				break
+			}
+		}
+		if p.x > 0 && p.x < width-1 && p.y < height-1 && grid[p.y][p.x] == 0 {
+			grid[p.y][p.x] = 2
+		} else {
+			break
+		}
+		i++
+		//fmt.Printf("%v\n", grid)
+	}
+	fmt.Printf("%v\n", grid)
+	fmt.Println("grains of sand:", i)
 }