結果
問題 |
No.160 最短経路のうち辞書順最小
|
ユーザー |
![]() |
提出日時 | 2018-03-19 13:52:48 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,958 bytes |
コンパイル時間 | 3,852 ms |
コンパイル使用メモリ | 115,504 KB |
実行使用メモリ | 32,820 KB |
最終ジャッジ日時 | 2024-12-31 10:43:22 |
合計ジャッジ時間 | 5,644 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 8 WA * 18 |
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.IO; using System.Linq; using System.Collections.Generic; class Program { static int[] dx = new int[] { 0, 0, 1, -1 }; static int[] dy = new int[] { 1, -1, 0, 0 }; const int INF = 1010101010; static void Solve() { var n = sc.Int(); var m = sc.Int(); var s = sc.Int(); var g = sc.Int(); var nodes = new List<List<Edge>>(); for (int i = 0; i < n; i++) nodes.Add(new List<Edge>()); var pre = new int[n]; for (int i = 0; i < m; i++) { var a = sc.Int(); var b = sc.Int(); var c = sc.Int(); nodes[a].Add(new Edge { To = b, Cost = c }); nodes[b].Add(new Edge { To = a, Cost = c }); } var used = new bool[n]; var cost = new int[n]; for (int i = 0; i < n; i++) { cost[i] = INF; pre[i] = i; } cost[s] = 0; for (int i = 0; i < n; i++) { var next = g; for (int j = 0; j < n; j++) { if (!used[j] && cost[j] < cost[next]) next = j; } used[next] = true; foreach(var e in nodes[next]) { if (cost[next] + e.Cost < cost[e.To]) { cost[e.To] = cost[next] + e.Cost; pre[e.To] = next; } if (cost[next] + e.Cost == cost[e.To]) pre[e.To] = Math.Min(pre[e.To], next); } } var path = new Stack<int>(); path.Push(g); while (path.Peek() != s) path.Push(pre[path.Peek()]); while(path.Count != 0) pr.Write($"{path.Pop()} "); } class Edge { public int To; public int Cost; } static double F(double prev, double next, double t) { return Math.Pow(Math.Exp((next - prev) / t), 2); } static int[,] Mul(int[,] a, int[,] b) { var ret = new int[a.GetLength(0), b.GetLength(1)]; for (int i = 0; i < a.GetLength(0); i++) for (int j = 0; j < b.GetLength(1); j++) for (int k = 0; k < a.GetLength(1); k++) ret[i, j] += a[i, k] * b[k, j]; return ret; } static int[,] Pow(int[,] a, int n) { var b = new int[a.GetLength(1), a.GetLength(0)]; var f = n % 2 == 1; for (int i = 0; i < a.GetLength(0); i++) b[i, i] = 1; while (n > 0) { if (n % 2 == 1) b = Mul(a, b); n >>= 1; } return b; } class Coord { public int x; public int y; } static void Main(string[] args) { // pr.AutoFlush = true; Solve(); pr.Flush(); // Console.ReadKey(); } static Scanner sc = new Scanner(); static Printer pr = new Printer(); } #region IO class Scanner { private int _i = 0; private string[] line = new string[0]; private T[] Enumerate<T>(int n, Func<T> f) { T[] ret = new T[n]; for (int i = 0; i < n; i++) ret[i] = f(); return ret; } public string Str() { if (line.Length <= _i) { line = Console.ReadLine().Split(' '); _i = 0; } return line[_i++]; } public int Int() => int.Parse(Str()); public long Long() => long.Parse(Str()); public double Double() => double.Parse(Str()); public int[] Int(int n) => Enumerate(n, Int); public long[] Long(int n) => Enumerate(n, Long); public double[] Double(int n) => Enumerate(n, Double); public string[] Str(int n) => Enumerate(n, Str); } class Printer : StreamWriter { public Printer() : base(Console.OpenStandardOutput()) { AutoFlush = false; } } #endregion