paused on day5

day5/main.go

@@ -0,0 +1,102 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		panic("Provide input file")
+	}
+	inputFile := os.Args[1]
+
+	part1, part2 := solution(inputFile)
+	fmt.Printf("(%s) Part 1: %d\n(%s) Part 2: %d\n:", inputFile, part1, inputFile, part2)
+}
+
+type Rule struct {
+	Left  int
+	Right int
+}
+
+func solution(inputFile string) (int, int) {
+	input, err := os.Open(inputFile)
+	if err != nil {
+		panic(err)
+	}
+	defer input.Close()
+
+	var rules []Rule
+	for {
+		var x, y int
+		_, err := fmt.Fscanf(input, "%d|%d\n", &x, &y)
+		if err != nil {
+			break
+		}
+		rules = append(rules, Rule{Left: x, Right: y})
+	}
+
+	// for _, rule := range rules {
+	// 	fmt.Printf("%d|%d\n", rule.Left, rule.Right)
+	// }
+
+	// checking if the updates are correct
+	var validSum, invalidSum int
+	for {
+		var numStr string
+		_, err := fmt.Fscanf(input, "%s\n", &numStr)
+		if err != nil {
+			break
+		}
+		parts := strings.Split(numStr, ",")
+		updatePages := make([]int, 0)
+		for _, part := range parts {
+			partInt, _ := strconv.Atoi(part)
+			updatePages = append(updatePages, partInt)
+		}
+
+		validUpdate := true
+		for curr := 0; curr < len(updatePages); curr++ {
+			for check := 0; check < len(updatePages); check++ {
+				if curr == check {
+					continue
+				}
+				if curr < check {
+					valid := isValid(rules, updatePages[curr], updatePages[check])
+					if !valid {
+						fmt.Printf("Invalid %v\n", updatePages)
+						validUpdate = false
+						break
+					}
+				} else {
+					valid := isValid(rules, updatePages[check], updatePages[curr])
+					if !valid {
+						fmt.Printf("Invalid %v\n", updatePages)
+						validUpdate = false
+					}
+				}
+			}
+			if !validUpdate {
+				break
+			}
+		}
+
+		if validUpdate {
+			validSum += updatePages[len(updatePages)/2]
+		}
+	}
+
+	return validSum, invalidSum
+}
+
+func isValid(rules []Rule, left, right int) bool {
+	for _, rule := range rules {
+		if rule.Left == right && rule.Right == left {
+			return false
+		}
+	}
+	return true
+}

day5/run

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+go build -o ./bin/solution ./main.go
+./bin/solution "$1"