結果
| 問題 | No.697 池の数はいくつか |
| ユーザー |
watarimaycry2
|
| 提出日時 | 2020-08-22 00:42:50 |
| 言語 | Java (openjdk 25.0.1) |
| 結果 |
AC
|
| 実行時間 | 1,589 ms / 6,000 ms |
| コード長 | 3,977 bytes |
| 記録 | |
| コンパイル時間 | 3,817 ms |
| コンパイル使用メモリ | 81,112 KB |
| 実行使用メモリ | 86,176 KB |
| 最終ジャッジ日時 | 2024-11-08 08:42:51 |
| 合計ジャッジ時間 | 20,908 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 32 |
ソースコード
import java.util.*; import java.io.*; import java.math.*;
public class Main{
//Don't have to see. start------------------------------------------
static class InputIterator{
ArrayList<String> inputLine = new ArrayList<String>(1024);
int index = 0; int max; String read;
InputIterator(){
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try{
while((read = br.readLine()) != null){
inputLine.add(read);
}
}catch(IOException e){}
max = inputLine.size();
}
boolean hasNext(){return (index < max);}
String next(){
if(hasNext()){
return inputLine.get(index++);
}else{
throw new IndexOutOfBoundsException("There is no more input");
}
}
}
static HashMap<Integer, String> CONVSTR = new HashMap<Integer, String>();
static InputIterator ii = new InputIterator();//This class cannot be used in reactive problem.
static PrintWriter out = new PrintWriter(System.out);
static void flush(){out.flush();}
static void myout(Object t){out.println(t);}
static void myerr(Object t){System.err.print("debug:");System.err.println(t);}
static String next(){return ii.next();}
static boolean hasNext(){return ii.hasNext();}
static int nextInt(){return Integer.parseInt(next());}
static long nextLong(){return Long.parseLong(next());}
static ArrayList<String> nextStrArray(){return myconv(next(), 8);}
static ArrayList<String> nextCharArray(){return myconv(next(), 0);}
static ArrayList<Integer> nextIntArray(){
ArrayList<String> input = nextStrArray(); ArrayList<Integer> ret = new ArrayList<Integer>(input.size());
for(int i = 0; i < input.size(); i++){
ret.add(Integer.parseInt(input.get(i)));
}
return ret;
}
static ArrayList<Long> nextLongArray(){
ArrayList<String> input = nextStrArray(); ArrayList<Long> ret = new ArrayList<Long>(input.size());
for(int i = 0; i < input.size(); i++){
ret.add(Long.parseLong(input.get(i)));
}
return ret;
}
static String myconv(Object list, int no){//only join
String joinString = CONVSTR.get(no);
if(list instanceof String[]){
return String.join(joinString, (String[])list);
}else if(list instanceof ArrayList){
return String.join(joinString, (ArrayList)list);
}else{
throw new ClassCastException("Don't join");
}
}
static ArrayList<String> myconv(String str, int no){//only split
String splitString = CONVSTR.get(no);
return new ArrayList<String>(Arrays.asList(str.split(splitString)));
}
public static void main(String[] args){
CONVSTR.put(8, " "); CONVSTR.put(9, "\n"); CONVSTR.put(0, "");
solve();flush();
}
//Don't have to see. end------------------------------------------
static boolean[][] list;
static int H;
static int W;
static void solve(){//Here is the main function
ArrayList<Integer> one = nextIntArray();
H = one.get(0);
W = one.get(1);
list = new boolean[H][W];
for(int i = 0; i < H; i++){
ArrayList<Integer> tmp = nextIntArray();
for(int j = 0; j < W; j++){
list[i][j] = (tmp.get(j) == 1) ? true : false;
}
}
int count = 0;
for(int i = 0; i < H; i++){
for(int j = 0; j < W; j++){
if(list[i][j]){
bfs(i,j);
count++;
}
}
}
myout(count);
}
//Method addition frame start
static void bfs(int y, int x){
int[] dy = {-1,0,1,0};
int[] dx = {0,-1,0,1};
ArrayDeque<Node> queue = new ArrayDeque<Node>();
list[y][x] = false;
queue.add(new Node(y, x));
while(queue.size() > 0){
Node tmp = queue.pollFirst();
int nowY = (int)tmp.getKey();
int nowX = (int)tmp.getValue();
for(int i = 0; i < 4; i++){
int nextY = nowY + dy[i];
int nextX = nowX + dx[i];
if(nextY >= 0 && nextY < H && nextX >= 0 && nextX < W){
if(list[nextY][nextX]){
queue.addLast(new Node(nextY, nextX));
list[nextY][nextX] = false;
}
}
}
}
}
static class Node{
int y;
int x;
Node(int y, int x){
this.y = y;
this.x = x;
}
int getKey(){
return y;
}
int getValue(){
return x;
}
}
//Method addition frame end
}
watarimaycry2