#487228 (Go) No.3 ビットすごろく

• 問題: No.3 ビットすごろく
• ユーザー: ccppjsrb
• 提出日時: 2020-05-26 21:14:29
• 言語: Go (1.23.4)
• 結果: AC
• 実行時間: 3 ms / 5,000 ms
• コード長: 1,961 bytes
• コンパイル時間: 13,425 ms
• コンパイル使用メモリ: 233,628 KB
• 実行使用メモリ: 6,944 KB
• 最終ジャッジ日時: 2024-07-01 09:49:05
• 合計ジャッジ時間: 14,415 ms
• ジャッジサーバーID （参考情報）: judge3 / judge1

ファイルパターン	結果
other	AC * 33

ソースコード

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package main
import (
    "bufio"
    "fmt"
    "os"
    "strconv"
)
func getScanner(fp *os.File) *bufio.Scanner {
    scanner := bufio.NewScanner(fp)
    scanner.Split(bufio.ScanWords)
    scanner.Buffer(make([]byte, 1000005), 1000005)
    return scanner
}
func getNextString(scanner *bufio.Scanner) string {
    scanner.Scan()
    return scanner.Text()
}
func getNextInt(scanner *bufio.Scanner) int {
    i, _ := strconv.Atoi(getNextString(scanner))
    return i
}
func getNextInt64(scanner *bufio.Scanner) int64 {
    i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
    return i
}
func getNextUint64(scanner *bufio.Scanner) uint64 {
    i, _ := strconv.ParseUint(getNextString(scanner), 10, 64)
    return i
}
func getNextFloat64(scanner *bufio.Scanner) float64 {
    i, _ := strconv.ParseFloat(getNextString(scanner), 64)
    return i
}
func main() {
    fp := os.Stdin
    wfp := os.Stdout
    cnt := 0
    if os.Getenv("MASPY") == "ますピ" {
        fp, _ = os.Open(os.Getenv("BEET_THE_HARMONY_OF_PERFECT"))
        cnt = 2
    }
    if os.Getenv("MASPYPY") == "ますピッピ" {
        wfp, _ = os.Create(os.Getenv("NGTKANA_IS_GENIUS10"))
    }
    scanner := getScanner(fp)
    writer := bufio.NewWriter(wfp)
    solve(scanner, writer)
    for i := 0; i < cnt; i++ {
        fmt.Fprintln(writer, "-----------------------------------")
        solve(scanner, writer)
    }
    writer.Flush()
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
    n := getNextInt(scanner)
    m := make([]int, n+1)
    q := make([]pair, 0)
    q = append(q, newPair(1, 1))
    for len(q) > 0 {
        p := q[0]
        q = q[1:]
        if p[0] < 1 {
            continue
        }
        if p[0] > n {
            continue
        }
        if m[p[0]] > 0 {
            continue
        }
        m[p[0]] = p[1]
        q = append(q, newPair(p[0]+popc(p[0]), p[1]+1))
        q = append(q, newPair(p[0]-popc(p[0]), p[1]+1))
    }
    if m[n] == 0 {
        fmt.Fprintln(writer, -1)
        return
    }
    fmt.Fprintln(writer, m[n])
}
type pair [2]int
func newPair(i, x int) pair {
    return pair{
        i,
        x,
    }
}
func popc(x int) int {
    i := 0
    for x > 0 {
        i += x % 2
        x >>= 1
    }
    return i
}
 
 
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