結果
問題 | No.367 ナイトの転身 |
ユーザー |
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提出日時 | 2016-04-06 01:01:29 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 419 ms / 2,000 ms |
コード長 | 3,142 bytes |
コンパイル時間 | 1,198 ms |
コンパイル使用メモリ | 116,052 KB |
実行使用メモリ | 85,816 KB |
最終ジャッジ日時 | 2024-10-04 02:06:57 |
合計ジャッジ時間 | 4,199 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
other | AC * 27 |
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.Generic;using System.Linq;public class otaku{static void Main(){var hw = Console.ReadLine().Split(' ').Select(int.Parse).ToArray().ValidateArray(x => 1 <= x && x <= 500);var h = hw[0];var w = hw[1];var map = new string[h];var type = "SGR.";for (int i = 0; i < h; i++){map[i] = Console.ReadLine().Validate(x => x.Length == w);map[i].ToCharArray().ValidateArray(x => type.Contains(x));}map.SelectMany(x=>x).Count(x=>x=='G').Validate(x=>x==1);map.SelectMany(x=>x).Count(x=>x=='S').Validate(x=>x==1);var G = new List<int>[h * w * 2 + 1];for(int i=0;i<=h*w*2;i++)G[i]=new List<int>();var D = Enumerable.Repeat(1000000000, h * w * 2 + 1).ToArray();var q = new Queue<int>();for (int i = 0; i < h; i++){for (int j = 0; j < w; j++){if (map[i][j] == 'S') { q.Enqueue(i * w + j); D[i * w + j] = 0; }if (map[i][j] == 'G') { G[i * w + j].Add(h * w * 2); G[i * w + j + h * w].Add(h * w * 2); }var from = i * w + j;for (int dy = -2; dy <= 2; dy++)for (int dx = -2; dx <= 2; dx++){if (Math.Abs(dy) == Math.Abs(dx)) continue;if(dy==0||dx==0)continue;var ny = i + dy;var nx = j + dx;if (ny < 0 || ny >= h || nx < 0 || nx >= w) continue;var next = ny * w + nx;if (map[ny][nx] == 'R') next += w * h;G[from].Add(next);}from += w * h;for (int dy = -1; dy <= 1; dy += 2)for (int dx = -1; dx <= 1; dx += 2){var ny = i + dy;var nx = j + dx;if (ny < 0 || ny >= h || nx < 0 || nx >= w) continue;var next = ny * w + nx;if (map[ny][nx] != 'R') next += w * h;G[from].Add(next);}}}while (q.Any()){var p = q.Dequeue();foreach (var to in G[p]){if (D[to] > D[p] + 1){D[to] = D[p] + 1;q.Enqueue(to);}}}if (D[h * w * 2] >= 1000000000)Console.WriteLine(-1);else Console.WriteLine(D[h * w * 2] - 1);}}static public class Validator{static public T Validate<T>(this T input, Func<T, bool> f){if (!f(input))throw new Exception("invalid input");return input;}static public T[] ValidateArray<T>(this T[] input, Func<T, bool> f){foreach (var x in input)if (!f(x))throw new Exception("invalid input");return input;}}