refactor(helper): update module path and function names

- move `helper` package files to root `helper` directory
- update all helper imports
- rename `GetLines` to `getLines` for consistent naming convention

🤖

helper/input.go

@@ -0,0 +1,53 @@
+package helper
+
+import (
+	"bufio"
+	"log"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+const INPUT_FILE = "input"
+
+func getLines() *bufio.Scanner {
+	wd, err := os.Getwd()
+	filePath := filepath.Join(wd, INPUT_FILE)
+
+	file, err := os.Open(filePath)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	return bufio.NewScanner(file)
+}
+
+func ReadLinesTwoIntSlices() (list_a []int, list_b []int) {
+	scanner := getLines()
+	for scanner.Scan() {
+		parts := strings.Fields(scanner.Text())
+
+		value_a, _ := strconv.Atoi(parts[0])
+		value_b, _ := strconv.Atoi(parts[1])
+
+		list_a = append(list_a, value_a)
+		list_b = append(list_b, value_b)
+	}
+
+	return list_a, list_b
+}
+
+func ReadLinesToIntSlices() (lines [][]int) {
+	scanner := getLines()
+	for scanner.Scan() {
+		string_line := strings.Fields(scanner.Text())
+		int_line := make([]int, len(string_line))
+		for i, val := range string_line {
+			int_line[i], _ = strconv.Atoi(val)
+		}
+		lines = append(lines, int_line)
+	}
+
+	return lines
+}