From 0cff9166252bc3b54795849b953c61f5b486a70b Mon Sep 17 00:00:00 2001
From: Brian Buller <brbuller@gmail.com>
Date: Wed, 12 Dec 2018 19:17:16 -0600
Subject: [PATCH] Progress on 2018.11

---
 2018/day11/day11.go | 60 +++++++++++++++++++++------------------------
 1 file changed, 28 insertions(+), 32 deletions(-)

diff --git a/2018/day11/day11.go b/2018/day11/day11.go
index 9ac4131..a96101c 100644
--- a/2018/day11/day11.go
+++ b/2018/day11/day11.go
@@ -23,26 +23,25 @@ func main() {
 		serial:     Atoi(os.Args[1]),
 		fuelLevels: make(map[string]int),
 	}
-	fmt.Println(timeMachine.calcSquareFuelLevel(90, 269, 16))
+	fmt.Println(timeMachine.getSquareFuelLevel(283, 169, 13))
 	os.Exit(0)
-
 	highest := MinInt
-	highestX, highestY := 0, 0
-	highestSize := 1
-	for size := 1; size <= 20; size++ {
-		fmt.Println(size)
+	highestX, highestY, highestSize := 0, 0, 1
+	for size := 1; size <= 13; size++ {
+		fmt.Println("=", size, "=")
 		for i := 0; i < 300-size; i++ {
 			for j := 0; j < 300-size; j++ {
-				w := timeMachine.getSquareLevel(i, j, size)
+				w := timeMachine.getSquareFuelLevel(i, j, size)
 				if w > highest {
 					highestX, highestY = i, j
-					highest = w
 					highestSize = size
+					highest = w
+					fmt.Printf("New Highest: %d,%d,%d : %d\n", highestX, highestY, highestSize, highest)
 				}
 			}
 		}
 	}
-	fmt.Print(highestX, ",", highestY, ",", highestSize, " : ", highest, "\n")
+	fmt.Printf("Highest: %d,%d,%d : %d\n", highestX, highestY, highestSize, highest)
 }
 
 type TimeMachine struct {
@@ -57,34 +56,30 @@ func (t *TimeMachine) getKeyForSquare(x, y, size int) string {
 	return bx + "," + by + "," + bs
 }
 
-func (t *TimeMachine) setSquareLevel(x, y, size, val int) {
-	t.fuelLevels[t.getKeyForSquare(x, y, size)] = val
-}
-
-func (t *TimeMachine) getSquareLevel(x, y, size int) int {
-	key := t.getKeyForSquare(x, y, size)
-	if ret, ok := t.fuelLevels[key]; !ok {
-		t.fuelLevels[key] = t.calcSquareLevel(x, y, size)
-		return t.fuelLevels[key]
-	} else {
-		return ret
+func (t *TimeMachine) getSquareFuelLevel(x, y, size int) int {
+	k := t.getKeyForSquare(x, y, size)
+	if v, ok := t.fuelLevels[k]; ok {
+		return v
 	}
-}
-
-func (t *TimeMachine) calcSquareLevel(x, y, size int) int {
+	var ret int
 	if size == 1 {
-		return t.calcFuelLevel(x, y)
-	}
-	ret := t.getSquareLevel(x, y, size-1)
-	for wx := x; wx < wx+size; wx++ {
-		ret += t.getSquareLevel(wx, y+size-1, 1)
-	}
-	for wy := y; wy < wy+size-1; wy++ {
-		ret += t.getSquareLevel(x+size-1, wy, 1)
+		ret = t.calcFuelLevel(x, y)
+	} else {
+		ret = t.getSquareFuelLevel(x, y, size-1)
+		// Add the right-most cells
+		for i := 0; i < size; i++ {
+			ret += t.calcFuelLevel(x+(size-1), y+i)
+		}
+		// Add the bottom cells
+		for i := 0; i < size-1; i++ {
+			ret += t.calcFuelLevel(x+i, y+(size-1))
+		}
 	}
+	t.fuelLevels[k] = ret
 	return ret
 }
 
+// calcFuelLevel calculates one cells fuel level
 func (t *TimeMachine) calcFuelLevel(x, y int) int {
 	rackId := x + 10
 	startingLevel := rackId * y
@@ -99,11 +94,12 @@ func (t *TimeMachine) calcFuelLevel(x, y int) int {
 	return ret
 }
 
+// calcSquareFuelLevel calculates all cells from x, y -> x+size, y+size
 func (t *TimeMachine) calcSquareFuelLevel(x, y, size int) int {
 	var ret int
 	for i := 0; i < size; i++ {
 		for j := 0; j < size; j++ {
-			ret += t.calcFuelLevel(i, j)
+			ret += t.calcFuelLevel(x+i, y+j)
 		}
 	}
 	return ret