[ADD] main: Added day 2 solution

02/main.go

@@ -0,0 +1,115 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"math"
+	"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
+}
+
+func TransformInput(lines []string) [][]int {
+	var result [][]int
+	var temp []int
+	var numb int
+	for _, line := range lines {
+		var numbs = strings.Split(line, " ")
+		temp = make([]int, len(numbs))
+		for i := 0; i < len(numbs); i++ {
+			numb, _ = strconv.Atoi(numbs[i])
+			temp[i] = numb
+		}
+		result = append(result, temp)
+	}
+
+	return result
+}
+
+func IsLineSafe(input []int) bool {
+	var decreasing = input[0] > input[1]
+	var dif = 0
+	for i := 0; i < len(input)-1; i++ {
+		if input[i] > input[i+1] && !decreasing || input[i] < input[i+1] && decreasing {
+			return false
+		}
+		dif = int(math.Abs(float64(input[i] - input[i+1])))
+		if dif < 1 || dif > 3 {
+			return false
+		}
+	}
+	return true
+}
+
+func Part1(input [][]int) int {
+	var result = 0
+
+	for _, line := range input {
+		if IsLineSafe(line) {
+			result++
+		}
+	}
+
+	return result
+}
+
+func Part2(input [][]int) int {
+	var result = 0
+	var temp []int
+	for _, line := range input {
+		if IsLineSafe(line) {
+			result++
+			continue
+		}
+
+		for i := 0; i < len(line); i++ {
+			temp = make([]int, 0)
+			temp = append(temp, line[:i]...)
+			temp = append(temp, line[i+1:]...)
+			if IsLineSafe(temp) {
+				result++
+				break
+			}
+		}
+	}
+
+	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))
+}

02/sample.txt

@@ -0,0 +1,6 @@
+7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9