2021 Day 10 Complete

2021-12-10 07:33:36 -06:00
parent 80c89aee26
commit e45541cef7
4 changed files with 345 additions and 0 deletions
--- a/2021/day10/main.go
+++ b/2021/day10/main.go
@@ -0,0 +1,94 @@
+package main
+
+import (
+	"fmt"
+	"sort"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+func main() {
+	fix(h.StdinToStringSlice())
+}
+
+func fix(inp []string) {
+	var clean []string
+	var fixScores []int
+	var score int
+	for i := range inp {
+		var opens []byte
+		valid := true
+		for _, b := range inp[i] {
+			switch b {
+			case '(':
+				opens = append(opens, byte(b))
+			case '[':
+				opens = append(opens, byte(b))
+			case '{':
+				opens = append(opens, byte(b))
+			case '<':
+				opens = append(opens, byte(b))
+			case ')':
+				if opens[len(opens)-1] != '(' {
+					valid = false
+					score += 3
+				} else {
+					opens = opens[:len(opens)-1]
+				}
+			case ']':
+				if opens[len(opens)-1] != '[' {
+					valid = false
+					score += 57
+				} else {
+					opens = opens[:len(opens)-1]
+				}
+			case '}':
+				if opens[len(opens)-1] != '{' {
+					valid = false
+					score += 1197
+				} else {
+					opens = opens[:len(opens)-1]
+				}
+			case '>':
+				if opens[len(opens)-1] != '<' {
+					valid = false
+					score += 25137
+				} else {
+					opens = opens[:len(opens)-1]
+				}
+			}
+			if !valid {
+				break
+			}
+		}
+		if valid {
+			var fixLineScore int
+			for bi := len(opens) - 1; bi >= 0; bi-- {
+				switch opens[bi] {
+				case '(':
+					inp[i] = inp[i] + string(')')
+					fixLineScore = (fixLineScore * 5) + 1
+				case '[':
+					inp[i] = inp[i] + string(']')
+					fixLineScore = (fixLineScore * 5) + 2
+				case '{':
+					inp[i] = inp[i] + string('}')
+					fixLineScore = (fixLineScore * 5) + 3
+				case '<':
+					inp[i] = inp[i] + string('>')
+					fixLineScore = (fixLineScore * 5) + 4
+				}
+			}
+			clean = append(clean, inp[i])
+			fixScores = append(fixScores, fixLineScore)
+		}
+	}
+	sort.Ints(fixScores)
+	acScore := fixScores[len(fixScores)/2]
+
+	fmt.Println("# Part 1")
+	fmt.Println("Syntax Checker Score:", score)
+	fmt.Println()
+	fmt.Println("# Part 2")
+	fmt.Println("Autocomplete Score:", acScore)
+}