結果
問題 | No.697 池の数はいくつか |
ユーザー | chocorusk |
提出日時 | 2020-10-04 01:36:12 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 571 ms / 6,000 ms |
コード長 | 3,524 bytes |
コンパイル時間 | 2,449 ms |
コンパイル使用メモリ | 77,992 KB |
実行使用メモリ | 123,876 KB |
最終ジャッジ日時 | 2024-11-08 08:46:07 |
合計ジャッジ時間 | 10,007 ms |
ジャッジサーバーID (参考情報) |
judge5 / 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 | 53 ms
36,920 KB |
testcase_01 | AC | 53 ms
37,096 KB |
testcase_02 | AC | 53 ms
36,836 KB |
testcase_03 | AC | 53 ms
36,924 KB |
testcase_04 | AC | 53 ms
37,060 KB |
testcase_05 | AC | 55 ms
36,676 KB |
testcase_06 | AC | 52 ms
37,088 KB |
testcase_07 | AC | 53 ms
36,884 KB |
testcase_08 | AC | 53 ms
36,816 KB |
testcase_09 | AC | 53 ms
36,532 KB |
testcase_10 | AC | 53 ms
36,896 KB |
testcase_11 | AC | 53 ms
36,836 KB |
testcase_12 | AC | 53 ms
36,876 KB |
testcase_13 | AC | 54 ms
36,724 KB |
testcase_14 | AC | 54 ms
36,900 KB |
testcase_15 | AC | 53 ms
36,776 KB |
testcase_16 | AC | 53 ms
36,956 KB |
testcase_17 | AC | 53 ms
37,084 KB |
testcase_18 | AC | 52 ms
36,692 KB |
testcase_19 | AC | 53 ms
36,668 KB |
testcase_20 | AC | 53 ms
36,848 KB |
testcase_21 | AC | 53 ms
36,956 KB |
testcase_22 | AC | 54 ms
36,908 KB |
testcase_23 | AC | 54 ms
36,808 KB |
testcase_24 | AC | 205 ms
51,596 KB |
testcase_25 | AC | 205 ms
51,412 KB |
testcase_26 | AC | 205 ms
51,416 KB |
testcase_27 | AC | 204 ms
51,368 KB |
testcase_28 | AC | 205 ms
51,424 KB |
testcase_29 | AC | 507 ms
123,776 KB |
testcase_30 | AC | 571 ms
123,844 KB |
testcase_31 | AC | 560 ms
123,876 KB |
testcase_32 | AC | 567 ms
123,740 KB |
testcase_33 | AC | 563 ms
123,876 KB |
testcase_34 | AC | 569 ms
123,584 KB |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.NoSuchElementException; public class Main{ public static void main(String[] args) { //Scanner scanner=new Scanner(System.in); FastScanner scanner=new FastScanner(); PrintWriter out=new PrintWriter(System.out); int h=scanner.nextInt(); int w=scanner.nextInt(); int[][] a=new int[h][w]; int cnt=0; for(int i=0; i<h; i++) { for(int j=0; j<w; j++) { a[i][j]=scanner.nextInt(); if(a[i][j]==1) cnt++; } } UnionFind uf=new UnionFind(h*w); for(int i=0; i<h; i++) { for(int j=0; j<w; j++) { if(a[i][j]==0) continue; int x=i*w+j; if(i+1<h && a[i+1][j]==1) { if(uf.unite(x, (i+1)*w+j)) cnt--; } if(j+1<w && a[i][j+1]==1) { if(uf.unite(x, i*w+j+1)) cnt--; } } } out.println(cnt); out.close(); //scanner.close(); } } class UnionFind{ int n; int[] par; int cmp; public UnionFind(int n) { this.n=n; this.par=new int[n]; Arrays.fill(this.par, -1); this.cmp=n; } public int find(int x) { if(par[x]<0) return x; return par[x]=find(par[x]); } public boolean unite(int x, int y) { x=find(x); y=find(y); if(x==y) { return false; } cmp--; if(par[x]>par[y]) { int tmp=x; x=y; y=tmp; } par[x]+=par[y]; par[y]=x; return true; } public boolean same(int x, int y) { return find(x)==find(y); } } 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());} }