[ADD] main: Added day 5 solution

05/main.go

@@ -0,0 +1,167 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+const FILE_PATH = "./input.txt"
+
+//const FILE_PATH = "./sample.txt"
+
+func LoadInput(filename string) ([]string, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	var lines []string
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		lines = append(lines, scanner.Text())
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
+
+	return lines, nil
+}
+
+type Rule struct {
+	definition int
+	limiter    int
+}
+
+type structuredInput struct {
+	rules   []Rule
+	updates [][]int
+}
+
+func TransformInput(lines []string) structuredInput {
+	var nums []string
+	var num1 int
+	var num2 int
+	var result structuredInput = structuredInput{}
+	var i = 0
+	for ; lines[i] != ""; i++ {
+		nums = strings.Split(lines[i], "|")
+		num1, _ = strconv.Atoi(nums[0])
+		num2, _ = strconv.Atoi(nums[1])
+		result.rules = append(result.rules, Rule{num1, num2})
+	}
+	i++
+	var c = 0
+	for ; i < len(lines); i++ {
+		result.updates = append(result.updates, make([]int, 0))
+		nums = strings.Split(lines[i], ",")
+		for _, num := range nums {
+			num1, _ = strconv.Atoi(num)
+			result.updates[c] = append(result.updates[c], num1)
+		}
+
+		c++
+	}
+
+	return result
+}
+
+func IsCorrect(rules []Rule, update []int) bool {
+
+	for i, page := range update {
+		for _, rule := range rules {
+			if rule.definition != page {
+				continue
+			}
+
+			for j := 0; j < i; j++ {
+				if update[j] == rule.limiter {
+					return false
+				}
+			}
+		}
+	}
+
+	return true
+}
+
+func Part1(input structuredInput) int {
+	var result = 0
+
+	for _, update := range input.updates {
+		if IsCorrect(input.rules, update) {
+			result += update[len(update)/2]
+		}
+	}
+
+	return result
+}
+
+func CorrectUpdate(rules []Rule, update []int) []int {
+	var result []int = make([]int, len(update))
+	copy(result, update)
+
+	var IsCorrect = false
+	var temp = 0
+	for !IsCorrect {
+		IsCorrect = true
+
+		for i, page := range result {
+			for _, rule := range rules {
+				if rule.definition != page {
+					continue
+				}
+
+				for j := 0; j < i; j++ {
+					if result[j] == rule.limiter {
+						temp = result[j]
+						result[j] = result[i]
+						result[i] = temp
+						IsCorrect = false
+						break
+					}
+				}
+				if !IsCorrect {
+					break
+				}
+			}
+			if !IsCorrect {
+				break
+			}
+		}
+	}
+
+	return result
+}
+
+func Part2(input structuredInput) int {
+	var result = 0
+
+	for _, update := range input.updates {
+		if IsCorrect(input.rules, update) {
+			continue
+		}
+
+		result += CorrectUpdate(input.rules, update)[len(update)/2]
+	}
+
+	return result
+}
+
+func main() {
+	input, err := LoadInput(FILE_PATH)
+	if err != nil {
+		fmt.Println("Error loading input:", err)
+		return
+	}
+
+	structuredInput := TransformInput(input)
+	fmt.Println("Structured Input:", structuredInput)
+
+	fmt.Println("Solution Part 1: ", Part1(structuredInput))
+	fmt.Println("Solution Part 2: ", Part2(structuredInput))
+}

05/sample.txt

@@ -0,0 +1,28 @@
+47|53
+97|13
+97|61
+97|47
+75|29
+61|13
+75|53
+29|13
+97|29
+53|29
+61|53
+97|53
+61|29
+47|13
+75|47
+97|75
+47|61
+75|61
+47|29
+75|13
+53|13
+
+75,47,61,53,29
+97,61,53,29,13
+75,29,13
+75,97,47,61,53
+61,13,29
+97,13,75,29,47