結果
| 問題 |
No.157 2つの空洞
|
| コンテスト | |
| ユーザー |
ccppjsrb
|
| 提出日時 | 2020-05-28 12:41:48 |
| 言語 | Go (1.23.4) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 3,144 bytes |
| コンパイル時間 | 11,218 ms |
| コンパイル使用メモリ | 231,412 KB |
| 実行使用メモリ | 6,816 KB |
| 最終ジャッジ日時 | 2024-10-13 04:06:55 |
| 合計ジャッジ時間 | 12,070 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 16 |
ソースコード
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 = 3
}
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) {
w := getNextInt(scanner)
h := getNextInt(scanner)
ss := make([]string, h)
for i := 0; i < h; i++ {
ss[i] = getNextString(scanner)
}
visit := makeGrid(h, w)
q := make([]queue, 0)
empties(h, w, ss, visit)
for i := 0; i < h; i++ {
for j := 0; j < w; j++ {
if visit[i][j] == 1 {
q = append(q, newQueue(i, j, 1))
}
}
}
dy := [4]int{-1, 0, 0, 1}
dx := [4]int{0, -1, 1, 0}
for len(q) > 0 {
p := q[0]
q = q[1:]
for i := 0; i < 4; i++ {
yy := p.y + dy[i]
xx := p.x + dx[i]
if yy < 0 || yy >= h {
continue
}
if xx < 0 || xx >= w {
continue
}
if visit[yy][xx] > 0 {
continue
}
visit[yy][xx] = p.c + 1
q = append(q, newQueue(yy, xx, p.c+1))
}
}
ans := 0
for i := 0; i < h; i++ {
for j := 0; j < w; j++ {
if ss[i][j] == '#' {
continue
}
if visit[i][j] == 1 {
continue
}
if ans == 0 || ans > visit[i][j] {
ans = visit[i][j]
}
}
}
fmt.Fprintln(writer, ans-2)
}
func makeGrid(h, w int) [][]int {
index := make([][]int, h, h)
data := make([]int, h*w, h*w)
for i := 0; i < h; i++ {
index[i] = data[i*w : (i+1)*w]
}
return index
}
func empties(h, w int, ss []string, visit [][]int) {
for i := 0; i < h; i++ {
for j := 0; j < w; j++ {
if ss[i][j] == '.' {
rec(h, w, i, j, ss, visit)
return
}
}
}
}
func rec(h, w, y, x int, ss []string, visit [][]int) {
if y < 0 || y >= h {
return
}
if x < 0 || x >= w {
return
}
if ss[y][x] != '.' {
return
}
if visit[y][x] != 0 {
return
}
visit[y][x] = 1
dy := [4]int{-1, 0, 0, 1}
dx := [4]int{0, -1, 1, 0}
for i := 0; i < 4; i++ {
yy := y + dy[i]
xx := x + dx[i]
rec(h, w, yy, xx, ss, visit)
}
}
func newQueue(y, x, c int) queue {
return queue{y: y, x: x, c: c}
}
type queue struct {
y, x, c int
}
ccppjsrb