57 lines
879 B
Go
57 lines
879 B
Go
package main
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import (
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"fmt"
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"log"
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"os"
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"strings"
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)
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func parseInput(file string) []string {
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content, err := os.ReadFile(file)
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if err != nil {
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log.Fatalf("Failed to read input file: %v", err)
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}
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return strings.Split(string(content), "\n")
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}
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func calculateSeatID(pass string) int {
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if len(pass) < 10 {
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return -1
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}
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rowStr := pass[:7]
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columnStr := pass[7:10]
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row := 0
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for idx, char := range rowStr {
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if char == 'B' {
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row |= 1 << (6 - idx)
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}
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}
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column := 0
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for idx, char := range columnStr {
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if char == 'R' {
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column |= 1 << (2 - idx)
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}
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}
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return row*8 + column
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}
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func PartOne(input []string) int {
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maxSeatID := 0
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for _, pass := range input {
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seatID := calculateSeatID(pass)
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if seatID > maxSeatID {
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maxSeatID = seatID
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}
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}
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return maxSeatID
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}
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func main() {
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input := parseInput("input.txt")
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fmt.Println("Part 1:", PartOne(input))
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}
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