結果
問題 | No.402 最も海から遠い場所 |
ユーザー |
|
提出日時 | 2016-07-23 00:09:30 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 1,720 ms / 3,000 ms |
コード長 | 4,047 bytes |
コンパイル時間 | 4,052 ms |
コンパイル使用メモリ | 85,768 KB |
実行使用メモリ | 395,392 KB |
最終ジャッジ日時 | 2024-11-06 13:45:10 |
合計ジャッジ時間 | 13,455 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 19 |
ソースコード
package contest;import java.io.ByteArrayInputStream;import java.io.IOException;import java.io.InputStream;import java.io.PrintWriter;import java.util.ArrayDeque;import java.util.Arrays;import java.util.InputMismatchException;import java.util.Queue;public class N402 {InputStream is;PrintWriter out;String INPUT = "";void solve(){int n = ni(), m = ni();char[][] map = nm(n,m);int[][] d = new int[n+2][m+2];for(int i = 0;i < n+2;i++){Arrays.fill(d[i], 99999999);}Queue<int[]> q = new ArrayDeque<>();for(int i = 0;i < n;i++){for(int j = 0;j < m;j++){if(map[i][j] == '.'){q.add(new int[]{i+1, j+1});d[i+1][j+1] = 0;}}}for(int i = 0;i < n+2;i++){q.add(new int[]{i, 0});d[i][0] = 0;q.add(new int[]{i, m+1});d[i][m+1] = 0;}for(int i = 0;i < m+2;i++){q.add(new int[]{0, i});d[0][i] = 0;q.add(new int[]{n+1, i});d[n+1][i] = 0;}int max = 0;while(!q.isEmpty()){int[] cur = q.poll();int r = cur[0], c = cur[1];max = Math.max(max, d[r][c]);for(int nr = r-1;nr <= r+1;nr++){for(int nc = c-1;nc <= c+1;nc++){if(nr >= 0 && nr < n+2 && nc >= 0 && nc < m+2 && d[nr][nc] > d[r][c] + 1){d[nr][nc] = d[r][c] + 1;q.add(new int[]{nr, nc});}}}}out.println(max);}void run() throws Exception{is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());out = new PrintWriter(System.out);long s = System.currentTimeMillis();solve();out.flush();if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");// Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){// @Override// public void run() {// long s = System.currentTimeMillis();// solve();// out.flush();// if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");// }// };// t.start();// t.join();}public static void main(String[] args) throws Exception { new N402().run(); }private byte[] inbuf = new byte[1024];private int lenbuf = 0, ptrbuf = 0;private int readByte(){if(lenbuf == -1)throw new InputMismatchException();if(ptrbuf >= lenbuf){ptrbuf = 0;try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }if(lenbuf <= 0)return -1;}return inbuf[ptrbuf++];}private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }private double nd() { return Double.parseDouble(ns()); }private char nc() { return (char)skip(); }private String ns(){int b = skip();StringBuilder sb = new StringBuilder();while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')sb.appendCodePoint(b);b = readByte();}return sb.toString();}private char[] ns(int n){char[] buf = new char[n];int b = skip(), p = 0;while(p < n && !(isSpaceChar(b))){buf[p++] = (char)b;b = readByte();}return n == p ? buf : Arrays.copyOf(buf, p);}private int[] na(int n){int[] a = new int[n];for(int i = 0;i < n;i++)a[i] = ni();return a;}private long[] nal(int n){long[] a = new long[n];for(int i = 0;i < n;i++)a[i] = nl();return a;}private char[][] nm(int n, int m) {char[][] map = new char[n][];for(int i = 0;i < n;i++)map[i] = ns(m);return map;}private int[][] nmi(int n, int m) {int[][] map = new int[n][];for(int i = 0;i < n;i++)map[i] = na(m);return map;}private int ni() { return (int)nl(); }private long nl(){long num = 0;int b;boolean minus = false;while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));if(b == '-'){minus = true;b = readByte();}while(true){if(b >= '0' && b <= '9'){num = num * 10 + (b - '0');}else{return minus ? -num : num;}b = readByte();}}private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }}