Day21 Part1

day21/day21.go

@@ -0,0 +1,86 @@
+package main
+
+import (
+	"AOC2022/helper"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type Operation struct {
+	value    int
+	apes     [2]string
+	operator string
+	hasValue bool
+}
+
+func main() {
+	//args := os.Args[1:]
+	lines := helper.ReadTextFile("day21/input")
+	apes := make(map[string]Operation)
+	apesWithValue := []string{}
+	apesWithOutValue := []string{}
+	for _, line := range lines {
+		id, operation := getApe(line)
+		apes[id] = operation
+		if len(operation.operator) > 0 {
+			apesWithOutValue = append(apesWithOutValue, id)
+		} else {
+			apesWithValue = append(apesWithValue, id)
+		}
+	}
+	fmt.Println(apesWithValue)
+	fmt.Println(apesWithOutValue)
+	for len(apesWithOutValue) > 0 {
+		apesWithOutValue = step(apesWithOutValue, &apes)
+	}
+	fmt.Print(apes["root"])
+
+}
+
+func step(apesWithOutValue []string, apes *map[string]Operation) []string {
+	newApesWithoutValue := []string{}
+	for _, id := range apesWithOutValue {
+		ape := (*apes)[id]
+		ape1 := (*apes)[ape.apes[0]]
+		ape2 := (*apes)[ape.apes[1]]
+		if ape1.hasValue && ape2.hasValue {
+			ape.value = calcOperation(ape1.value, ape2.value, ape.operator)
+			ape.hasValue = true
+			(*apes)[id] = ape
+		} else {
+			newApesWithoutValue = append(newApesWithoutValue, id)
+		}
+	}
+	return newApesWithoutValue
+}
+
+func getApe(line string) (id string, operation Operation) {
+	splitLine := strings.Split(line, ": ")
+	id = splitLine[0]
+	if strings.ContainsAny(splitLine[1], " ") {
+		operationLine := strings.Split(splitLine[1], " ")
+		operation.apes[0] = operationLine[0]
+		operation.apes[1] = operationLine[2]
+		operation.operator = string(operationLine[1][0])
+	} else {
+		operation.hasValue = true
+		operation.value = helper.RemoveError(strconv.Atoi(splitLine[1]))
+	}
+	return
+}
+
+func calcOperation(val1, val2 int, op string) int {
+	switch op {
+	case "*":
+		return val1 * val2
+	case "/":
+		return val1 / val2
+	case "+":
+		return val1 + val2
+	case "-":
+		return val1 - val2
+	default:
+		return -99999999999999
+	}
+}

day21/testinput

@@ -0,0 +1,15 @@
+root: pppw + sjmn
+dbpl: 5
+cczh: sllz + lgvd
+zczc: 2
+ptdq: humn - dvpt
+dvpt: 3
+lfqf: 4
+humn: 5
+ljgn: 2
+sjmn: drzm * dbpl
+sllz: 4
+pppw: cczh / lfqf
+lgvd: ljgn * ptdq
+drzm: hmdt - zczc
+hmdt: 32