AdventOfCode2021/day10/10a/main.go

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package main
import (
"bufio"
"fmt"
"os"
)
func main() {
content := returnContent("../input")
2021-12-16 19:55:49 +00:00
//content := returnContent("../testInput")
var bracketMap map[byte]byte = make(map[byte]byte)
var bracketCost map[byte]int = make(map[byte]int)
answer := 0
bracketMap[')'] = '('
bracketMap[']'] = '['
bracketMap['}'] = '{'
bracketMap['>'] = '<'
bracketCost[')'] = 3
bracketCost[']'] = 57
bracketCost['}'] = 1197
bracketCost['>'] = 25137
for _, row := range *content {
var stack Stack = Stack{}
for _, char := range row {
brack, found := bracketMap[char]
if !found {
//If it is an opening bracket
stack.Push(char)
} else {
if brack == stack.Peek().char {
stack.Pop()
} else {
answer += bracketCost[char]
fmt.Println("Illegal,", char, "found", answer)
break
}
}
}
}
fmt.Println(answer)
}
func returnContent(path string) *[][]byte {
//read file and return it as an array of integers
file, err := os.Open(path)
var content [][]byte
if err != nil {
fmt.Println("Unlucky, the file didn't open")
return &content
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
content = append(content, []byte(scanner.Text()))
}
return &content
}