finally d13p2 ...

day13/day.go

@@ -1,7 +1,6 @@
 package day13
 
 import (
-	"fmt"
 	"strconv"
 	"strings"
 	"tools"
@@ -49,6 +48,7 @@ func buildMaze(maxX, maxY int) tools.GridToggle {
 	return maze
 }
 
+/*
 func printMaze(maze tools.GridToggle, path []tools.Coordinate) {
 	pathMap := make(map[tools.Coordinate]int)
 	for i, c := range path {
@@ -69,16 +69,30 @@ func printMaze(maze tools.GridToggle, path []tools.Coordinate) {
 		fmt.Println()
 	}
 }
+*/
 
 func Part1(puzzle tools.AoCPuzzle) interface{} {
 	favNumber, targetX, targetY = parseInput(puzzle.GetInputArray())
 	maze := buildMaze(targetX+mazeHangover, targetY+mazeHangover)
 	path := maze.GetPathAStar(tools.Coordinate{X: 1, Y: 1}, tools.Coordinate{X: targetX, Y: targetY}, false)
-	printMaze(maze, path)
 
 	return len(path) - 1
 }
 
 func Part2(puzzle tools.AoCPuzzle) interface{} {
-	return 0
+	favNumber, targetX, targetY = parseInput(puzzle.GetInputArray())
+	maze := buildMaze(52, 52)
+	targets := 0
+	for x := 0; x < 50; x++ {
+		for y := 0; y < 50; y++ {
+			if maze.State(x, y) {
+				continue
+			}
+			checkPath := maze.GetPathAStar(tools.Coordinate{X: 1, Y: 1}, tools.Coordinate{X: x, Y: y}, false)
+			if checkPath != nil && len(checkPath) <= 51 {
+				targets++
+			}
+		}
+	}
+	return targets
 }