結果
問題 | No.1023 Cyclic Tour |
ユーザー | 37zigen |
提出日時 | 2020-04-14 01:44:51 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 427 ms / 2,000 ms |
コード長 | 4,143 bytes |
コンパイル時間 | 2,366 ms |
コンパイル使用メモリ | 79,704 KB |
実行使用メモリ | 103,332 KB |
最終ジャッジ日時 | 2024-10-01 07:54:46 |
合計ジャッジ時間 | 19,923 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
(要ログイン)
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 | 69 ms
51,148 KB |
testcase_01 | AC | 54 ms
49,696 KB |
testcase_02 | AC | 54 ms
50,132 KB |
testcase_03 | AC | 54 ms
49,988 KB |
testcase_04 | AC | 240 ms
68,296 KB |
testcase_05 | AC | 236 ms
71,740 KB |
testcase_06 | AC | 245 ms
70,468 KB |
testcase_07 | AC | 233 ms
70,528 KB |
testcase_08 | AC | 215 ms
68,600 KB |
testcase_09 | AC | 231 ms
69,164 KB |
testcase_10 | AC | 250 ms
70,340 KB |
testcase_11 | AC | 262 ms
76,168 KB |
testcase_12 | AC | 242 ms
69,144 KB |
testcase_13 | AC | 222 ms
69,344 KB |
testcase_14 | AC | 239 ms
71,620 KB |
testcase_15 | AC | 243 ms
69,200 KB |
testcase_16 | AC | 298 ms
70,916 KB |
testcase_17 | AC | 276 ms
76,128 KB |
testcase_18 | AC | 302 ms
71,156 KB |
testcase_19 | AC | 274 ms
70,948 KB |
testcase_20 | AC | 349 ms
79,652 KB |
testcase_21 | AC | 371 ms
81,864 KB |
testcase_22 | AC | 374 ms
79,296 KB |
testcase_23 | AC | 349 ms
79,584 KB |
testcase_24 | AC | 312 ms
78,908 KB |
testcase_25 | AC | 339 ms
80,228 KB |
testcase_26 | AC | 354 ms
80,784 KB |
testcase_27 | AC | 354 ms
80,632 KB |
testcase_28 | AC | 316 ms
79,976 KB |
testcase_29 | AC | 339 ms
80,056 KB |
testcase_30 | AC | 314 ms
80,452 KB |
testcase_31 | AC | 312 ms
81,176 KB |
testcase_32 | AC | 342 ms
85,084 KB |
testcase_33 | AC | 305 ms
82,784 KB |
testcase_34 | AC | 261 ms
71,736 KB |
testcase_35 | AC | 272 ms
74,308 KB |
testcase_36 | AC | 393 ms
79,196 KB |
testcase_37 | AC | 339 ms
84,372 KB |
testcase_38 | AC | 320 ms
81,756 KB |
testcase_39 | AC | 427 ms
79,376 KB |
testcase_40 | AC | 399 ms
80,232 KB |
testcase_41 | AC | 370 ms
80,032 KB |
testcase_42 | AC | 315 ms
79,128 KB |
testcase_43 | AC | 266 ms
72,024 KB |
testcase_44 | AC | 284 ms
74,240 KB |
testcase_45 | AC | 255 ms
88,900 KB |
testcase_46 | AC | 293 ms
87,704 KB |
testcase_47 | AC | 358 ms
103,332 KB |
testcase_48 | AC | 415 ms
81,768 KB |
testcase_49 | AC | 379 ms
81,852 KB |
testcase_50 | AC | 370 ms
81,596 KB |
testcase_51 | AC | 323 ms
81,836 KB |
testcase_52 | AC | 301 ms
81,624 KB |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Arrays; import java.util.NoSuchElementException; class DJSet { int n; int[] upper; public DJSet(int n) { this.n=n; upper=new int[n]; Arrays.fill(upper, -1); } int root(int x) { return upper[x]<0?x:(upper[x]=root(upper[x])); } boolean equiv(int x,int y) { return root(x)==root(y); } void setUnion(int x,int y) { x=root(x);y=root(y); if(x==y) return; if (upper[x]<upper[y]) { x^=y;y^=x;x^=y; } if (upper[x]==upper[y]) --upper[y]; upper[x]=y; } } public class Main { void dfs(int cur,int par,ArrayList<Integer>[] g,int[] col,boolean uni) { col[cur]=1; for (int dst:g[cur]) { if (!uni&&dst==par) continue; if ((!uni&&col[dst]!=0)||(uni&&col[dst]==1)) { System.out.println("Yes"); System.exit(0); } if (col[dst]==0) dfs(dst,cur,g,col,uni); } col[cur]=2; } void run() { FastScanner sc=new FastScanner(); PrintWriter pw=new PrintWriter(System.out); int N=sc.nextInt(); int M=sc.nextInt(); ArrayList<Integer>[] g=new ArrayList[N]; ArrayList<Integer>[] g2=new ArrayList[N]; DJSet ds=new DJSet(N); int[] a=new int[M]; int[] b=new int[M]; int[] c=new int[M]; for (int i=0;i<N;++i) g[i]=new ArrayList<>(); for (int i=0;i<N;++i) g2[i]=new ArrayList<>(); for (int i=0;i<M;++i) { a[i]=sc.nextInt(); b[i]=sc.nextInt(); c[i]=sc.nextInt(); --a[i];--b[i]; if (c[i]==1) { // bi g[a[i]].add(b[i]); g[b[i]].add(a[i]); ds.setUnion(a[i], b[i]); } } int[] col=new int[N]; for (int i=0;i<N;++i) { if (col[i]==0) dfs(i,-1,g,col,false); } for (int i=0;i<M;++i) { if (c[i]==2) { // uni if (ds.equiv(a[i], b[i])) { System.out.println("Yes"); return; } g2[ds.root(a[i])].add(ds.root(b[i])); } } Arrays.fill(col, 0); for (int i=0;i<N;++i) { if (i==ds.root(i) && col[i]==0) dfs(ds.root(i), -1, g2, col,true); } pw.println("No"); pw.close(); } void tr(Object...objects) {System.out.println(Arrays.deepToString(objects));} public static void main(String[] args) { new Main().run(); } } 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;} private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;} public boolean hasNext() { skipUnprintable(); 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() { return (int)nextLong(); } }