結果
問題 | No.848 なかよし旅行 |
ユーザー | 37zigen |
提出日時 | 2020-03-23 15:36:59 |
言語 | Java21 (openjdk 21) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,014 bytes |
コンパイル時間 | 2,513 ms |
コンパイル使用メモリ | 79,696 KB |
実行使用メモリ | 56,652 KB |
最終ジャッジ日時 | 2024-06-07 20:48:21 |
合計ジャッジ時間 | 8,306 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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 | 453 ms
56,652 KB |
testcase_01 | AC | 52 ms
36,568 KB |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | AC | 47 ms
36,876 KB |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | AC | 49 ms
36,500 KB |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | AC | 181 ms
46,396 KB |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | AC | 87 ms
38,620 KB |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | AC | 48 ms
36,736 KB |
testcase_25 | WA | - |
testcase_26 | AC | 49 ms
36,604 KB |
testcase_27 | AC | 47 ms
36,768 KB |
testcase_28 | AC | 48 ms
36,836 KB |
testcase_29 | AC | 47 ms
36,604 KB |
ソースコード
import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Arrays; import java.util.NoSuchElementException; import java.util.PriorityQueue; class Edge{ int dst; long cost; public Edge(int dst,long cost) { this.dst=dst; this.cost=cost; } } public class Main { public static void main(String[] args) throws FileNotFoundException { long t = System.currentTimeMillis(); new Main().run(); System.err.println(System.currentTimeMillis() - t); } long[] shortest_path(int src,ArrayList<Edge>[] g) { long[] dp=new long[g.length]; long INF=Long.MAX_VALUE/3; Arrays.fill(dp, INF); dp[src]=0; class S implements Comparable<S>{ int v; long d; public S(int v,long d) { this.v=v; this.d=d; } public int compareTo(S o) { return Long.compare(d, o.d); }; } PriorityQueue<S> pq=new PriorityQueue<>(); pq.add(new S(src, 0)); while(!pq.isEmpty()) { S s=pq.poll(); if(dp[s.v]<s.d)continue; for(Edge e:g[s.v]) { if(dp[s.v]+e.cost<dp[e.dst]) { dp[e.dst]=dp[s.v]+e.cost; pq.add(new S(e.dst,dp[e.dst])); } } } return dp; } void run() { FastScanner sc = new FastScanner(); int N=sc.nextInt(); int M=sc.nextInt(); int P=sc.nextInt()-1; int Q=sc.nextInt()-1; long T=sc.nextLong(); ArrayList<Edge>[] g=new ArrayList[N]; for(int i=0;i<N;++i)g[i]=new ArrayList<>(); for(int i=0;i<M;++i) { int a=sc.nextInt()-1; int b=sc.nextInt()-1; long c=sc.nextLong(); g[a].add(new Edge(b,c)); g[b].add(new Edge(a,c)); } long[] v0=shortest_path(0, g); long[] vp=shortest_path(P, g); long[] vq=shortest_path(Q, g); long INF=Long.MAX_VALUE/3; long ans=-INF; if(v0[P]+v0[Q]+vp[Q]<=T)ans=T; for(int i=0;i<N;++i) { if(2*(v0[i]+Math.max(vp[i], vq[i]))<=T) { ans=Math.max(ans, T-2*Math.max(vp[i], vq[i])); } } System.out.println(ans==-INF?-1:ans); } static void tr(Object... objects) { System.out.println(Arrays.deepToString(objects)); } } 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(); } }