結果
問題 | No.157 2つの空洞 |
ユーザー | t8m8⛄️ |
提出日時 | 2015-03-30 18:41:24 |
言語 | Java21 (openjdk 21) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,087 bytes |
コンパイル時間 | 3,435 ms |
コンパイル使用メモリ | 78,820 KB |
実行使用メモリ | 37,676 KB |
最終ジャッジ日時 | 2024-07-03 22:57:23 |
合計ジャッジ時間 | 5,381 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 46 ms
37,024 KB |
testcase_01 | AC | 47 ms
36,984 KB |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | AC | 46 ms
37,156 KB |
testcase_05 | AC | 50 ms
36,812 KB |
testcase_06 | WA | - |
testcase_07 | AC | 45 ms
36,656 KB |
testcase_08 | AC | 46 ms
36,964 KB |
testcase_09 | AC | 48 ms
36,972 KB |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | AC | 75 ms
37,676 KB |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 54 ms
36,968 KB |
testcase_18 | WA | - |
testcase_19 | WA | - |
ソースコード
//No.157 2つの空洞 import java.util.*; import java.io.*; import static java.util.Arrays.*; import static java.lang.Math.*; public class No157 { static final InputStream in = System.in; static final PrintWriter out = new PrintWriter(System.out,false); static void solve(){ w = nextInt(); h = nextInt(); cs = new char[h][w]; for (int i=0; i<h; i++) { cs[i] = next().toCharArray(); } visited = new BitSet(w*h); visited2 = new BitSet(w*h); outer: for (int i=0; i<h; i++) { for (int j=0; j<w; j++) { if (cs[i][j] == '.') { dfs(i,j); break outer; } } } int ans = Integer.MAX_VALUE; for (int i=0; i<h; i++) { for (int j=0; j<w; j++) { if (visited.get(i*w+j)) { ans = min(ans,dfs(i,j,0)); visited2.clear(); } } } out.println(ans); } static int w,h; static int[] dy = {0,0,1,-1}; static int[] dx = {1,-1,0,0}; static char[][] cs; static BitSet visited, visited2; static void dfs(int y, int x) { visited.set(y*w+x); for (int i=0; i<4; i++) { int ny = y + dy[i]; int nx = x + dx[i]; if (ny < 0 || h <= ny || nx < 0 || w <= nx) continue; if (!visited.get(ny*w+nx) && cs[ny][nx] == '.') { dfs(ny,nx); } } } static int dfs(int y, int x, int depth) { visited2.set(y*w+x); int res = Integer.MAX_VALUE; for (int i=0; i<4; i++) { int ny = y + dy[i]; int nx = x + dx[i]; if (ny < 0 || h <= ny || nx < 0 || w <= nx) continue; if (!visited.get(ny*w+nx) && cs[ny][nx] == '.') { return depth; }else if (!visited2.get(ny*w+nx) && cs[ny][nx] == '#') { res = min(res,dfs(ny,nx,depth+1)); } } return res; } public static void main(String[] args) throws Exception { long start = System.currentTimeMillis(); solve(); out.flush(); long end = System.currentTimeMillis(); //trace(end-start + "ms"); in.close(); } static void trace(Object... o) { System.out.println(deepToString(o));} static final byte[] buf = new byte[1024]; static int ptr = 0; static int buflen = 0; static boolean hasNextByte() { if (ptr < buflen) return true; ptr = 0; try{ buflen = in.read(buf); }catch (IOException e) {e.printStackTrace();} if (buflen <= 0) return false; return true; } static int readByte() { if (hasNextByte()) return buf[ptr++]; else return -1;} static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;} static void skip() { while(hasNextByte() && !isPrintableChar(buf[ptr])) ptr++;} static boolean hasNext() {skip(); return hasNextByte();} static 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(); } static long nextLong() { if (!hasNext()) throw new NoSuchElementException(); boolean minus = false; long num = readByte(); if(num == '-'){ num = 0; minus = true; }else if (num < '0' || '9' < num){ throw new NumberFormatException(); }else{ num -= '0'; } while(true){ int b = readByte(); if('0' <= b && b <= '9') num = num * 10 + (b - '0'); else if(b == -1 || !isPrintableChar(b)) return minus ? -num : num; else throw new NoSuchElementException(); } } static int nextInt() { long num = nextLong(); if (num < Integer.MIN_VALUE || Integer.MAX_VALUE < num) throw new NumberFormatException(); return (int)num; } static double nextDouble() { return Double.parseDouble(next()); } static char nextChar() { if (!hasNext()) throw new NoSuchElementException(); return (char)readByte(); } static String nextLine() { while (hasNextByte() && (buf[ptr] == '\n' || buf[ptr] == '\r')) ptr++; if (!hasNextByte()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (b != '\n' && b != '\r') { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } static int[] nextArrayInt(int n) { int[] a = new int[n]; for (int i=0; i<n; i++) a[i] = nextInt(); return a; } }