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- package main
- import (
- "bufio"
- "fmt"
- "log"
- "os"
- "regexp"
- "strings"
- )
- type valve struct {
- name string
- rate int
- open bool
- connections []string
- }
- func readInput(file *os.File) ([]string, map[string]valve) {
- scanner := bufio.NewScanner(file)
- valves := make(map[string]valve)
- var vertices []string
- for scanner.Scan() {
- line := scanner.Text()
- if line == "" {
- continue
- }
- var current valve
- if strings.Contains(line, "valves") {
- n, err := fmt.Sscanf(line, "Valve %s has flow rate=%d", ¤t.name, ¤t.rate)
- if n != 2 || err != nil {
- log.Fatal("Can't parse (valves):", line, err)
- }
- re := regexp.MustCompile(`valves .*`)
- parts := re.FindString(line)
- parts = strings.TrimLeft(parts, "valves ")
- current.connections = strings.Split(parts, ", ")
- } else {
- var connection string
- n, err := fmt.Sscanf(line, "Valve %s has flow rate=%d; tunnel leads to valve %s", ¤t.name, ¤t.rate, &connection)
- if n != 3 || err != nil {
- log.Fatal("Can't parse:", line, err)
- }
- current.connections = append(current.connections, connection)
- }
- vertices = append(vertices, current.name)
- valves[current.name] = current
- }
- return vertices, valves
- }
- type path struct {
- from string
- to string
- cost int
- }
- func buildGraph(valves map[string]valve) []path {
- var graph []path
- for key, value := range valves {
- for i := range value.connections {
- graph = append(graph, path{key, value.connections[i], 1})
- }
- }
- return graph
- }
- func main() {
- if len(os.Args) < 2 {
- log.Fatal("You need to specify a file!")
- }
- filePath := os.Args[1]
- file, err := os.Open(filePath)
- if err != nil {
- log.Fatalf("Failed to open %s!\n", filePath)
- }
- vertices, valves := readInput(file)
- graph := buildGraph(valves)
- fmt.Println(vertices, graph)
- }
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