結果
| 問題 |
No.157 2つの空洞
|
| コンテスト | |
| ユーザー |
hhgfhn1
|
| 提出日時 | 2018-12-24 14:32:02 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 86 ms / 2,000 ms |
| コード長 | 4,696 bytes |
| コンパイル時間 | 2,791 ms |
| コンパイル使用メモリ | 78,584 KB |
| 実行使用メモリ | 51,200 KB |
| 最終ジャッジ日時 | 2024-09-25 11:00:00 |
| 合計ジャッジ時間 | 4,695 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / 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
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.NoSuchElementException;
public class Main {
public static void main(String args[]) {
FastScanner scanner = new FastScanner();
w=scanner.nextInt();
h=scanner.nextInt();
bord=new char[h][w];
tarX1=new ArrayList<>();
tarY1=new ArrayList<>();
tarX2=new ArrayList<>();
tarY2=new ArrayList<>();
for(int i=0;i<h;i++) {
String s=scanner.next();
for(int j=0;j<w;j++) {
char c=s.charAt(j);
bord[i][j]=c;
}
}
out:for(int i=0;i<h;i++) {
for(int j=0;j<w;j++) {
if(bord[i][j]=='.') {
dfs1(i,j);
break out;
}
}
}
out:for(int i=0;i<h;i++) {
for(int j=0;j<w;j++) {
if(bord[i][j]=='.'&&check(j,i,tarX1,tarY1)) {
dfs2(i,j);
break out;
}
}
}
int min=Integer.MAX_VALUE;
for(int i=0;i<tarX1.size();i++) {
for(int j=0;j<tarX2.size();j++) {
int tmp=Math.abs(tarX1.get(i)-tarX2.get(j))+Math.abs(tarY1.get(i)-tarY2.get(j));
tmp--;
min=Math.min(tmp, min);
}
}
System.out.println(min);
}
static int h;
static int w;
static char[][] bord;
static List<Integer> tarX1;
static List<Integer> tarY1;
static List<Integer> tarX2;
static List<Integer> tarY2;
private static void dfs1(int i, int j) {
tarX1.add(j);
tarY1.add(i);
check4Neighborhood1(j,i);
}
private static void check4Neighborhood1(int x, int y) {
for (int i = -1; i <= 1; i++) {
for (int j = -1; j <= 1; j++) {
if ((i == 0 && j != 0) || (i != 0 && j == 0)) {
int tarX = j + x;
int tarY = i + y;
if (0 <= tarX && tarX <= bord[0].length - 1 && 0 <= tarY && tarY <= bord.length - 1) {
if (bord[tarY][tarX]=='.'&&check(tarX,tarY,tarX1,tarY1)) {
dfs1(tarY,tarX);
}
}
}
}
}
}
private static boolean check(int tarX, int tarY, List<Integer> tarX12, List<Integer> tarY12) {
for(int i=0;i<tarX12.size();i++) {
if(tarX==tarX12.get(i)&&tarY==tarY12.get(i)) {
return false;
}
}
return true;
}
private static void dfs2(int i, int j) {
tarX2.add(j);
tarY2.add(i);
check4Neighborhood2(j,i);
}
private static void check4Neighborhood2(int x, int y) {
for (int i = -1; i <= 1; i++) {
for (int j = -1; j <= 1; j++) {
if ((i == 0 && j != 0) || (i != 0 && j == 0)) {
int tarX = j + x;
int tarY = i + y;
if (0 <= tarX && tarX <= bord[0].length - 1 && 0 <= tarY && tarY <= bord.length - 1) {
if (bord[tarY][tarX]=='.'&&check(tarX,tarY,tarX2,tarY2)) {
dfs2(tarY,tarX);
}
}
}
}
}
}
}
class FastScanner {
private final InputStream in = System.in;
private final byte[] buffer = new byte[1024];
private int ptr = 0;
private int buflen = 0;
private boolean hasNextByte() {
if (ptr < buflen) {
return true;
}else{
ptr = 0;
try {
buflen = in.read(buffer);
} catch (IOException e) {
e.printStackTrace();
}
if (buflen <= 0) {
return false;
}
}
return true;
}
private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
public String next() {
if (!hasNext()) throw new NoSuchElementException();
StringBuilder sb = new StringBuilder();
int b = readByte();
while(isPrintableChar(b)) {
sb.appendCodePoint(b);
b = readByte();
}
return sb.toString();
}
public long nextLong() {
if (!hasNext()) throw new NoSuchElementException();
long n = 0;
boolean minus = false;
int b = readByte();
if (b == '-') {
minus = true;
b = readByte();
}
if (b < '0' || '9' < b) {
throw new NumberFormatException();
}
while(true){
if ('0' <= b && b <= '9') {
n *= 10;
n += b - '0';
}else if(b == -1 || !isPrintableChar(b)){
return minus ? -n : n;
}else{
throw new NumberFormatException();
}
b = readByte();
}
}
public int nextInt() {
long nl = nextLong();
if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
return (int) nl;
}
public double nextDouble() { return Double.parseDouble(next());}
}
hhgfhn1