#512441 (Go) No.170 スワップ文字列(Easy)

• 問題: No.170 スワップ文字列(Easy)
• ユーザー: ccppjsrb
• 提出日時: 2020-07-17 12:20:00
• 言語: Go (1.22.1)
• 結果: AC
• 実行時間: 43 ms / 5,000 ms
• コード長: 1,859 bytes
• コンパイル時間: 14,394 ms
• コンパイル使用メモリ: 222,720 KB
• 実行使用メモリ: 7,040 KB
• 最終ジャッジ日時: 2024-11-28 01:09:57
• 合計ジャッジ時間: 14,131 ms
• ジャッジサーバーID （参考情報）: judge5 / judge4

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 5,248 KB
testcase_01	AC	43 ms; 7,040 KB
testcase_02	AC	33 ms; 5,248 KB
testcase_03	AC	34 ms; 5,248 KB
testcase_04	AC	35 ms; 5,248 KB
testcase_05	AC	43 ms; 6,912 KB
testcase_06	AC	43 ms; 6,912 KB
testcase_07	AC	5 ms; 5,248 KB
testcase_08	AC	34 ms; 5,248 KB
testcase_09	AC	35 ms; 5,248 KB
testcase_10	AC	41 ms; 5,632 KB
testcase_11	AC	1 ms; 5,248 KB
testcase_12	AC	1 ms; 5,248 KB
testcase_13	AC	1 ms; 5,248 KB
testcase_14	AC	1 ms; 5,248 KB
testcase_15	AC	2 ms; 5,248 KB
testcase_16	AC	1 ms; 5,248 KB
testcase_17	AC	1 ms; 5,248 KB
testcase_18	AC	1 ms; 5,248 KB
testcase_19	AC	1 ms; 5,248 KB
testcase_20	AC	1 ms; 5,248 KB
testcase_21	AC	2 ms; 5,248 KB
testcase_22	AC	1 ms; 5,248 KB
testcase_23	AC	1 ms; 5,248 KB

ソースコード

package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func configure(scanner *bufio.Scanner) {
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
}
func getNextString(scanner *bufio.Scanner) string {
	scanned := scanner.Scan()
	if !scanned {
		panic("scan failed")
	}
	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 getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	extra := 0
	if os.Getenv("I") == "IronMan" {
		fp, _ = os.Open(os.Getenv("END_GAME"))
		extra = 100
	}
	scanner := bufio.NewScanner(fp)
	configure(scanner)
	writer := bufio.NewWriter(wfp)
	defer func() {
		r := recover()
		if r != nil {
			fmt.Fprintln(writer, r)
		}
		writer.Flush()
	}()
	solve(scanner, writer)
	for i := 0; i < extra; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	s := getNextString(scanner)
	n := len(s)
	sm := stringmap{}
	permutation(0, n, 0, s, make([]int, n), sm.swapped)
	fmt.Fprintln(writer, len(sm)-1)
}

func permutation(i, n int, used uint32, s string, a []int, f func(ss string, aa []int)) {
	if i == n {
		f(s, a)
	}
	for ii := 0; ii < n; ii++ {
		if used>>uint(ii)&1 == 1 {
			continue
		}
		a[i] = ii
		permutation(i+1, n, used|1<<uint(ii), s, a, f)
	}
}

type stringmap map[string]bool

func (sm *stringmap) swapped(s string, a []int) {
	n := len(s)
	ss := make([]string, n)
	for i := 0; i < n; i++ {
		ss[i] = fmt.Sprintf("%c", s[a[i]])
	}
	(*sm)[strings.Join(ss, "")] = true
}