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 | kuuso1 |
提出日時 | 2016-12-10 03:23:56 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 460 ms / 2,000 ms |
コード長 | 5,914 bytes |
コンパイル時間 | 1,018 ms |
コンパイル使用メモリ | 114,332 KB |
実行使用メモリ | 63,212 KB |
最終ジャッジ日時 | 2024-05-07 09:53:54 |
合計ジャッジ時間 | 7,916 ms |
ジャッジサーバーID (参考情報) |
judge3 / 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 | 26 ms
18,560 KB |
testcase_01 | AC | 26 ms
18,560 KB |
testcase_02 | AC | 26 ms
18,816 KB |
testcase_03 | AC | 26 ms
18,560 KB |
testcase_04 | AC | 26 ms
18,560 KB |
testcase_05 | AC | 26 ms
18,432 KB |
testcase_06 | AC | 26 ms
18,688 KB |
testcase_07 | AC | 26 ms
18,688 KB |
testcase_08 | AC | 26 ms
18,816 KB |
testcase_09 | AC | 26 ms
18,432 KB |
testcase_10 | AC | 27 ms
18,560 KB |
testcase_11 | AC | 26 ms
18,688 KB |
testcase_12 | AC | 26 ms
18,816 KB |
testcase_13 | AC | 26 ms
18,688 KB |
testcase_14 | AC | 28 ms
19,072 KB |
testcase_15 | AC | 28 ms
19,200 KB |
testcase_16 | AC | 27 ms
18,944 KB |
testcase_17 | AC | 28 ms
19,072 KB |
testcase_18 | AC | 28 ms
19,072 KB |
testcase_19 | AC | 27 ms
19,072 KB |
testcase_20 | AC | 27 ms
19,328 KB |
testcase_21 | AC | 28 ms
19,072 KB |
testcase_22 | AC | 27 ms
18,944 KB |
testcase_23 | AC | 28 ms
19,328 KB |
testcase_24 | AC | 439 ms
62,956 KB |
testcase_25 | AC | 451 ms
62,952 KB |
testcase_26 | AC | 460 ms
63,212 KB |
testcase_27 | AC | 453 ms
62,956 KB |
testcase_28 | AC | 453 ms
63,084 KB |
testcase_29 | AC | 446 ms
62,844 KB |
testcase_30 | AC | 451 ms
63,080 KB |
testcase_31 | AC | 446 ms
62,832 KB |
testcase_32 | AC | 451 ms
62,824 KB |
testcase_33 | AC | 441 ms
63,056 KB |
testcase_34 | AC | 146 ms
51,156 KB |
testcase_35 | AC | 27 ms
18,816 KB |
testcase_36 | AC | 26 ms
18,816 KB |
コンパイルメッセージ
Microsoft (R) Visual C# Compiler version 3.9.0-6.21124.20 (db94f4cc) Copyright (C) Microsoft Corporation. All rights reserved.
ソースコード
using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; using System.IO; class TEST{ static void Main(){ Sol mySol =new Sol(); mySol.Solve(); } } class Sol{ public void Solve(){ int[] InDeg = new int[N]; for(int i=0;i<N;i++){ foreach(var nxt in E[i]) InDeg[nxt.Pos]++; } // Debug.Assert( InDeg[0] == 0 ); // Debug.Assert( InDeg.Skip(1).Select(x => x !=0).Aggregate(true, (b,y) => b&y ) ); int[] ENT = new int[N]; // Earliest Node Time for(int i=0;i<N;i++) ENT[i] = -1; ENT[0] = 0; Queue<int> Q = new Queue<int>(); Q.Enqueue(0); while(Q.Count>0){ var now = Q.Dequeue(); foreach(var nxt in E[now]){ InDeg[nxt.Pos]--; if(InDeg[nxt.Pos] == 0){ Q.Enqueue(nxt.Pos); } ENT[nxt.Pos] = Math.Max(ENT[nxt.Pos], ENT[now] + nxt.Cost); } } int[] OutDeg = new int[N]; int[] LNT = new int[N]; // Latest Node Time for(int i=0;i<N;i++) LNT[i] = int.MaxValue; LNT[N-1] = ENT[N-1]; Q = new Queue<int>(); Q.Enqueue(N-1); while(Q.Count>0){ var now = Q.Dequeue(); foreach(var rev in XE[now]){ OutDeg[rev.Pos]++; if(OutDeg[rev.Pos] == E[rev.Pos].Count){ Q.Enqueue(rev.Pos); } LNT[rev.Pos] = Math.Min(LNT[rev.Pos], LNT[now] - rev.Cost); } } // Debug.Assert( OutDeg[N-1] == 0 ); // Debug.Assert( OutDeg.Zip(E,(n,p) => n == p.Count).Aggregate(true, (b,y) => b&y ) ); // Debug.Assert( ENT.Zip(LNT,(e,l) => e > l).Count( b => b ) == 0); //Console.WriteLine(String.Join(" ",ENT)); //Console.WriteLine(String.Join(" ",LNT)); //int marginPersonCount = ENT.Zip(LNT,(e,l) => l > e).Count( b => b ); int marginPersonCount = 0; for(int i=0;i<N;i++) if(ENT[i] < LNT[i]) marginPersonCount++; Console.WriteLine("{0} {1}/{2}",ENT[N-1],marginPersonCount,N); } int N,M; List<Pair>[] E; List<Pair>[] XE; public Sol(){ // read input using(var r = new FastIn(1000000)){ N = r.ReadInt(); M = r.ReadInt(); E = new List<Pair>[N]; for(int i=0;i<N;i++) E[i] = new List<Pair>(); XE = new List<Pair>[N]; for(int i=0;i<N;i++) XE[i] = new List<Pair>(); for(int i=0;i<M;i++){ int a = r.ReadInt(); int b = r.ReadInt(); int c = r.ReadInt(); E[a].Add(new Pair(b,c)); XE[b].Add(new Pair(a,c)); } } } class Pair{ public int Pos,Cost; public Pair(int pos, int cost){ Pos = pos; Cost = cost; } } } class FastIn:IDisposable { int Size; byte[] Mem; int ptr; int rsize; bool unfinished; Stream stdin; void Init(int n) { Size = n; Mem = new byte[Size]; rsize=(stdin=Console.OpenStandardInput()).Read(Mem, 0, Size); ptr = 0; unfinished=(rsize == Size); } void Next() { if (unfinished == false) return; rsize=stdin.Read(Mem, 0, Size); ptr = 0; unfinished = (rsize == Size); } ~FastIn(){ stdin.Dispose(); } void IDisposable.Dispose(){ stdin.Dispose(); } public void Dispose(){ stdin.Dispose(); } public FastIn() { Init(100000); } public FastIn(int n) { Init(n); } public int ReadInt() { int ret = 0; int sig = 1; while (ptr < rsize && Mem[ptr] != ' ' && Mem[ptr] != '\n' && Mem[ptr] != '\r' ) { if(ret==0 && Mem[ptr] == '-'){ sig *= -1; ptr++; continue; } ret = ret * 10 + Mem[ptr++] - '0'; if (ptr == Size) Next(); } while (ptr < rsize && (Mem[ptr] == ' ' || Mem[ptr] == '\n' || Mem[ptr] == '\r') ) { ptr++; if (ptr == Size) Next(); } return ret*sig; } public double ReadDouble() { double ret = 0; double sig = 1; bool dot = false; double keta = 0.1; while (ptr < rsize && Mem[ptr] != ' ' && Mem[ptr] != '\n' && Mem[ptr] != '\r' ) { if(ret==0 && Mem[ptr] == '-'){ sig *= -1; ptr++; if (ptr == Size) Next(); continue; } if(Mem[ptr] == '.'){ dot = true; ptr++; if (ptr == Size) Next(); continue; } if(!dot){ ret = ret * 10 + Mem[ptr++] - '0'; if (ptr == Size) Next(); }else{ ret = ret + (Mem[ptr++] - '0')*keta; keta /= 10.0; if (ptr == Size) Next(); } } while (ptr < rsize && (Mem[ptr] == ' ' || Mem[ptr] == '\n' || Mem[ptr] == '\r') ) { ptr++; if (ptr == Size) Next(); } return ret*sig; } public uint ReadUint() { uint ret = 0; uint sig = 1; while (ptr < rsize && Mem[ptr] != ' ' && Mem[ptr] != '\n' && Mem[ptr] != '\r' ) { ret = ret * 10 + Mem[ptr++] - '0'; if (ptr == Size) Next(); } while (ptr < rsize && (Mem[ptr] == ' ' || Mem[ptr] == '\n' || Mem[ptr] == '\r') ) { ptr++; if (ptr == Size) Next(); } return ret*sig; } public long ReadLong() { long ret = 0; long sig = 1; while (ptr < rsize && Mem[ptr] != ' ' && Mem[ptr] != '\n' && Mem[ptr] != '\r' ) { if(ret==0 && Mem[ptr] == '-'){ sig *= -1; ptr++; continue; } ret = ret * 10 + Mem[ptr++] - '0'; if (ptr == Size) Next(); } while (ptr < rsize && (Mem[ptr] == ' ' || Mem[ptr] == '\n' || Mem[ptr] == '\r') ) { ptr++; if (ptr == Size) Next(); } return ret*sig; } public String ReadStr() { //2byte文字はNG StringBuilder sb = new StringBuilder(); while (ptr < rsize && Mem[ptr] != ' ' && Mem[ptr] != '\n' && Mem[ptr] != '\r') { sb.Append((char)Mem[ptr++]); if (ptr == Size && unfinished) Next(); } while (ptr < rsize && (Mem[ptr] == ' ' || Mem[ptr] == '\n' || Mem[ptr] == '\r') ) { ptr++; if (ptr == Size && unfinished) Next(); } return sb.ToString(); } public String ReadLine() { //極力使わない(split/parseするくらいなら上をつかう) StringBuilder sb = new StringBuilder(); while (ptr < rsize && Mem[ptr] != '\n' && Mem[ptr] != '\r') { sb.Append((char)Mem[ptr++]); if (ptr == Size && unfinished) Next(); } while (ptr < rsize && (Mem[ptr] == ' ' || Mem[ptr] == '\n' || Mem[ptr] == '\r')) { ptr++; if (ptr == Size && unfinished) Next(); } return sb.ToString(); } }