71 lines
926 B
Go
71 lines
926 B
Go
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package main
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import (
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"bufio"
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"errors"
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"fmt"
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"os"
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"strconv"
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"strings"
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)
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func check(err error) {
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if err != nil {
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panic(err)
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}
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}
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type beam int
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type beams struct {
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b map[beam]struct{}
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}
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func (b *beams) add(pos beam) {
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b.b[pos] = {}
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}
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func main() {
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file, err := os.Open("five.txt")
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check(err)
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defer file.Close()
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scanner := bufio.NewScanner(file)
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scanner.Scan()
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text := scanner.Text()
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start := strings.IndexRune(text, 'S')
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beams.add(beam(start))
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for scanner.Scan() {
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}
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db, err := parse(scanner)
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check(err)
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nRaw := len(db.ranges)
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for {
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before, after := db.collapse()
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fmt.Printf("Collapsed %d to %d ranges\n", before, after)
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if before == after {
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break
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}
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}
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potentialNFresh := 0
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for _, r := range db.ranges {
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potentialNFresh += r.nInRange()
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}
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fmt.Printf(
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"N raw %d and consolidated %d. %d potential fresh ingredients.\n",
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nRaw,
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len(db.ranges),
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potentialNFresh,
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)
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}
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