Zwischenstand

day13/day13.go

@@ -8,53 +8,84 @@ import (
 
 func main() {
 	//args := os.Args[1:]
-	lines := helper.ReadTextFile("day13/testinput")
+	lines := helper.ReadTextFile("day13/input")
 	result := 0
 	index := 1
-	for i := 18; i < len(lines); i += 3 {
+	for i := 0; i < len(lines); i += 3 {
-		fmt.Println(i)
+		//fmt.Println(lines[i])
-		if comparePair(lines[i], lines[i+1]) {
+		//fmt.Println(lines[i+1])
+		//fmt.Println(comparePair(lines[i], lines[i+1]))
+		//fmt.Println()
+		if comparePair(lines[i], lines[i+1]) == 0 {
 			result += index
 		}
+		if comparePair(lines[i], lines[i+1]) == -2 {
+			fmt.Println(lines[i])
+			fmt.Println(lines[i+1])
+			fmt.Println(comparePair(lines[i], lines[i+1]))
+			fmt.Println()
+		}
+
 		index++
 	}
 	fmt.Println(result)
 
 }
 
-func comparePair(left string, right string) bool {
+// 0 Right Order
-	lefIndex := 0
+//-1 Left Value to high
-	rightIndex := 0
+//-2 Right had no values left
+func comparePair(left string, right string) int {
+	lefIndex := -1
+	rightIndex := -1
 	currentElemLeft := 0
 	currentElemRight := 0
+	leftElementType := 0
+	rightElementType := 0
 	for lefIndex < len(left)-1 {
-		lefIndex = getNextElement(left, lefIndex)
+		lefIndex, leftElementType = getNextElement(left, lefIndex)
-		if left[lefIndex] == ']' {
+		rightIndex, rightElementType = getNextElement(right, rightIndex)
-			lefIndex = getNextElement(left, lefIndex+1)
+		if leftElementType == -1 {
-			rightIndex = getEndofCurrentArray(right, rightIndex)
+			return 0
-			rightIndex = getNextElement(right, rightIndex+1)
+		}
-		} else {
+		if leftElementType == -2 {
-			rightIndex = getNextElement(right, rightIndex)
+			for rightElementType != -2 && rightElementType != 0 {
-			if rightIndex == -1 {
+				rightIndex, rightElementType = getNextElement(right, rightIndex)
-				return false
+				if rightElementType == -1 {
+					return -2
+				}
+			}
+			if rightElementType == 0 {
+				for leftElementType != 0 {
+					lefIndex, leftElementType = getNextElement(left, lefIndex)
+					if leftElementType == -1 {
+						return -2
+					}
+				}
+			}
+		}
+		if leftElementType == -3 {
+			rightIndex = getEndofCurrentArray(right, rightIndex)
+			rightElementType = -3
+		}
+		if leftElementType == 0 {
+			for rightElementType != 0 {
+				rightIndex, rightElementType = getNextElement(right, rightIndex)
+				if rightElementType == -1 || rightElementType == -3 {
+					return -2
 				}
-			if lefIndex == -1 {
-				return true
 			}
 			currentElemLeft, lefIndex = readElement(left, lefIndex)
 			currentElemRight, rightIndex = readElement(right, rightIndex)
-			fmt.Println(currentElemLeft)
-			fmt.Println(currentElemRight)
-			fmt.Println()
 			if currentElemLeft > currentElemRight {
-				return false
+				return -1
 			}
 			if currentElemLeft < currentElemRight {
-				return true
+				return 0
 			}
 		}
 	}
-	return true
+	return 0
 }
 
 // 0 Element
@@ -62,7 +93,7 @@ func comparePair(left string, right string) bool {
 //-2 Start Array
 //-3 End Array
 func getNextElement(packet string, currentIndex int) (int, int) {
-	index := currentIndex
+	index := currentIndex + 1
 	for index < len(packet) {
 		switch packet[index] {
 		case ',':
@@ -87,14 +118,22 @@ func getNextElement(packet string, currentIndex int) (int, int) {
 
 func getEndofCurrentArray(packet string, currentIndex int) int {
 	index := currentIndex
-	for index < len(packet) {
+	openedArrays := 1
-		if packet[index] == ']' {
+	for openedArrays > 0 && index < len(packet) {
-			return index
+		switch packet[index] {
+		case ']':
+			openedArrays--
+		case '[':
+			openedArrays++
 		}
 		index++
 	}
+	if openedArrays == 0 {
+		return index
+	} else {
 		return -1
 	}
+}
 
 func readElement(packet string, currentIndex int) (element, newIndex int) {
 	index := currentIndex
@@ -111,5 +150,5 @@ func readElement(packet string, currentIndex int) (element, newIndex int) {
 			index++
 		}
 	}
-	return helper.RemoveError(strconv.Atoi(packet[currentIndex:newIndex])), newIndex
+	return helper.RemoveError(strconv.Atoi(packet[currentIndex:newIndex])), newIndex - 1
 }