:work: Part 2 of day 7 still not working

day7/main.go

@@ -3,8 +3,8 @@ package main
 import (
 	"bufio"
 	"errors"
-	"fmt"
 	"log"
+	"math"
 	"os"
 	"strconv"
 	"strings"
@@ -34,21 +34,123 @@ func main() {
 		t2 = append(t2, j)
 	}
 	wip := make([]int, len(t2))
+	wip2 := make([]int, len(t2))
+
 	// ========= Finish now, we can solve the task ======
 	copy(wip, t2)
-	err = ParseArray(wip)
-	if err != nil {
-		log.Println(err)
-	}
+	SolvePuzzle1(wip)
+	copy(wip2, t2)
+	SolvePuzzle2(wip2)
 }
 
-func ParseArray(list []int) error {
+func SolvePuzzle1(list []int) {
+
+	rawr := []int{0, 1, 2, 3, 4}
+	combinations := permutations(rawr)
+	highestOutput := math.MinInt32
+	//highestInput := ""
+
+	for _, combi := range combinations {
+		output := RunAmplification(list, []int{int(combi[0]), int(combi[1]), int(combi[2]), int(combi[3]), int(combi[4])})
+		if output > highestOutput {
+			//highestInput = combi
+			highestOutput = output
+		}
+	}
+	log.Println("Part1: " + strconv.Itoa(highestOutput))
+}
+
+func SolvePuzzle2(list []int) {
+
+	rawr := []int{9, 8, 7, 6, 5}
+	combinations := permutations(rawr)
+	highestOutput := math.MinInt32
+	//highestInput := ""
+
+	for _, combi := range combinations {
+		output := RunRecursiveAmplification(list, []int{combi[0], combi[1], combi[2], combi[3], combi[4]})
+		if output > highestOutput {
+			//highestInput = combi
+			highestOutput = output
+		}
+	}
+	log.Println("Part2: " + strconv.Itoa(highestOutput))
+}
+
+func RunAmplification(list []int, phases []int) int {
+	signal := []string{"0"}
+
+	for i := 0; i < 5; i++ {
+		wip := make([]int, len(list))
+		copy(wip, list)
+
+		inputs := make([]int, 0)
+		inputs = append(inputs, phases[i])
+		for j := 0; j < len(signal); j++ {
+			inputStr, _ := strconv.Atoi(signal[j])
+			inputs = append(inputs, inputStr)
+		}
+
+		output, err, _ := ParseArray(wip, inputs)
+
+		if err != nil {
+			log.Printf("Problem at Amplification: %d", i+1)
+			log.Fatal(err)
+		}
+
+		signal = output
+	}
+	sigInt, _ := strconv.Atoi(signal[0])
+	return sigInt
+}
+
+func RunRecursiveAmplification(list []int, phases []int) int {
+	signal := []string{"0"}
+
+	i := 0
+	for true {
+		wip := make([]int, len(list))
+		copy(wip, list)
+
+		inputs := make([]int, 0)
+		inputs = append(inputs, phases[i])
+		for j := 0; j < len(signal); j++ {
+			inputStr, _ := strconv.Atoi(signal[j])
+			inputs = append(inputs, inputStr)
+		}
+
+		output, err, cmdSuccess := ParseArray(wip, inputs)
+
+		if err != nil {
+			log.Printf("Problem at Amplification: %d", i+1)
+			log.Fatal(err)
+		}
+
+		signal = output
+
+		if cmdSuccess && i == 4 {
+			break
+		}
+
+		if i == 4 {
+			i = -1
+		}
+		i++
+	}
+	sigInt, _ := strconv.Atoi(signal[len(signal)-1])
+	return sigInt
+}
+
+func ParseArray(list []int, inputs []int) (output []string, err error, cmdEnd bool) {
+	inputIndex := 0
+	output = make([]string, 0)
+
 	for i := 0; i < len(list); i += 4 {
 		//log.Println(strconv.Itoa(i) +  " -> "  + strconv.Itoa(list[i]))
 		cmd := list[i]
 
 		if cmd == 99 {
-			return nil
+			return output, nil, true
 		}
 		sum := 0
 
@@ -105,15 +207,24 @@ func ParseArray(list []int) error {
 			sum = num1 * num2
 			list[list[i+3]] = sum
 		} else if cmd == 3 {
-			var input int
-			fmt.Scanf("%d", &input)
-			list[list[i+1]] = input
+			//log.Println(i)
+
+			if len(inputs) > inputIndex {
+				input := inputs[inputIndex]
+				inputIndex++
+				list[list[i+1]] = input
+			} else {
+				input := output[0]
+				output = output[1:]
+				inputInt, _ := strconv.Atoi(input)
+				list[list[i+1]] = inputInt
+			}
 			i = i - 2
 		} else if cmd == 4 {
 			if mode1 == 1 {
-				fmt.Print(list[i+1])
+				output = append(output, strconv.Itoa(list[i+1]))
 			} else {
-				fmt.Print(list[list[i+1]])
+				output = append(output, strconv.Itoa(list[list[i+1]]))
 			}
 			i = i - 2
 		} else if cmd == 5 {
@@ -189,10 +300,10 @@ func ParseArray(list []int) error {
 				list[list[i+3]] = 0
 			}
 		} else {
-			return errors.New("Wrong Command (" + strconv.Itoa(list[i]) + ") at position " + strconv.Itoa(i))
+			return output, errors.New("Wrong Command (" + strconv.Itoa(list[i]) + ") at position " + strconv.Itoa(i)), false
 		}
 	}
-	return nil
+	return output, nil, false
 }
 
 func CountDigits(i int) int {
@@ -203,3 +314,31 @@ func CountDigits(i int) int {
 	}
 	return count
 }
+
+func permutations(arr []int) [][]int {
+	var helper func([]int, int)
+	res := [][]int{}
+
+	helper = func(arr []int, n int) {
+		if n == 1 {
+			tmp := make([]int, len(arr))
+			copy(tmp, arr)
+			res = append(res, tmp)
+		} else {
+			for i := 0; i < n; i++ {
+				helper(arr, n-1)
+				if n%2 == 1 {
+					tmp := arr[i]
+					arr[i] = arr[n-1]
+					arr[n-1] = tmp
+				} else {
+					tmp := arr[0]
+					arr[0] = arr[n-1]
+					arr[n-1] = tmp
+				}
+			}
+		}
+	}
+	helper(arr, len(arr))
+	return res
+}