結果
問題 |
No.468 役に立つ競技プログラミング実践編
|
ユーザー |
|
提出日時 | 2016-12-18 19:03:10 |
言語 | Java (openjdk 23) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,216 bytes |
コンパイル時間 | 2,586 ms |
コンパイル使用メモリ | 78,892 KB |
実行使用メモリ | 126,500 KB |
最終ジャッジ日時 | 2024-12-14 08:34:24 |
合計ジャッジ時間 | 41,509 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 21 TLE * 10 |
other | AC * 5 TLE * 1 |
ソースコード
import java.io.*; import java.util.*; import java.util.stream.*; import static java.lang.Math.*; 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; } ptr = 0; try { buflen = in.read(buffer); } catch(IOException ex) { ex.printStackTrace(); } if(buflen <= 0) { return false; } return true; } private int readByte() { if(hasNextByte()) { return buffer[ptr++]; } 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(); } } } // }}} class Edge { int from, to, cost; public Edge(int from, int to, int cost) { this.from = from; this.to = to; this.cost = cost; } } public class Main { private void solve() { FastScanner sc = new FastScanner(); int n = (int)sc.nextLong(), m = (int)sc.nextLong(); Edge[] G0 = new Edge[m], rG = new Edge[m]; for(int i=0; i<m; ++i) { int a = (int)sc.nextLong(), b = (int)sc.nextLong(), c = (int)sc.nextLong(); G0[i] = new Edge(a, b, -c); rG[i] = new Edge(b, a, -c); } int[] cost0 = new int[n]; Arrays.fill(cost0, 1); cost0[0] = 0; while(true) { boolean update = false; for(Edge e : G0) { if(cost0[e.from] != 1 && cost0[e.to] > cost0[e.from] + e.cost) { cost0[e.to] = cost0[e.from] + e.cost; update = true; } } if(!update) { break; } } int days = -cost0[n-1]; int[] rcost = new int[n]; Arrays.fill(rcost, 1); rcost[n-1] = 0; while(true) { boolean update = false; for(Edge e : rG) { if(rcost[e.from] != 1 && rcost[e.to] > rcost[e.from] + e.cost) { rcost[e.to] = rcost[e.from] + e.cost; update = true; } } if(!update) { break; } } int cnt = 0; for(int i=0; i<n; ++i) { if(-cost0[i] != days + rcost[i]) { ++cnt; } } System.out.printf("%d %d/%d\n", days, cnt, n); } public static void main(String[] args) { new Main().solve(); } }