結果
| 問題 |
No.86 TVザッピング(2)
|
| コンテスト | |
| ユーザー |
eitaho
|
| 提出日時 | 2015-03-14 01:11:09 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 4,263 ms / 5,000 ms |
| コード長 | 3,440 bytes |
| コンパイル時間 | 883 ms |
| コンパイル使用メモリ | 117,744 KB |
| 実行使用メモリ | 49,756 KB |
| 最終ジャッジ日時 | 2025-06-20 13:58:48 |
| 合計ジャッジ時間 | 7,574 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 30 |
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.Text;
using System.Diagnostics;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using Enu = System.Linq.Enumerable;
class Program
{
static readonly int[] DR = { 0, -1, 0, 1 };
static readonly int[] DC = { 1, 0, -1, 0 };
static readonly int[] MoveCand = { 0, 1 };
int H, W, EmptyCount;
string[] grid;
void Solve()
{
H = reader.Int();
W = reader.Int();
grid = reader.StringArray(H);
EmptyCount = string.Join("", grid).Count(c => c == '.');
bool ok = false;
for (int r = 0; !ok && r < H; r++)
for (int c = 0; !ok && c < W; c++)
if (grid[r][c] == '.')
for (int d = 0; !ok && d < DR.Length; d++)
ok |= OK(r, c, d);
Console.WriteLine(ok ? "YES" : "NO");
}
private bool OK(int sr, int sc, int d)
{
if (!Movable(sr + DR[d], sc + DC[d])) return false;
var seen = new bool[grid.Length, grid[0].Length];
int count = 0, moveR = 0, r = sr, c = sc;
while (true)
{
if (!MoveNext(ref r, ref c, ref d, ref moveR, seen)) break;
count++;
seen[r, c] = true;
}
return r == sr && c == sc && count == EmptyCount; //&& moveR <= 1;
}
bool MoveNext(ref int r, ref int c, ref int d, ref int R, bool[,] seen)
{
foreach (int move in MoveCand)
{
int nd = (d + move) % DR.Length;
int nr = r + DR[nd], nc = c + DC[nd];
if (Movable(nr, nc) && !seen[nr, nc]) { r = nr; c = nc; d = nd; if (move == 3) R++; return true; }
}
return false;
}
bool Movable(int r, int c) { return r >= 0 && r < H && c >= 0 && c < W && grid[r][c] == '.'; }
Reader reader = new Reader(Console.In);
static void Main() { new Program().Solve(); }
}
class Reader
{
private readonly TextReader reader;
private readonly char[] separator = { ' ' };
private readonly StringSplitOptions removeOp = StringSplitOptions.RemoveEmptyEntries;
private string[] A = new string[0];
private int i;
public Reader(TextReader r) { reader = r; }
public Reader(string file) { reader = new StreamReader(file); }
public bool HasNext() { return Enqueue(); }
public string String() { return Dequeue(); }
public int Int() { return int.Parse(Dequeue()); }
public long Long() { return long.Parse(Dequeue()); }
public double Double() { return double.Parse(Dequeue()); }
public int[] IntLine() { var s = Line(); return s == "" ? new int[0] : Array.ConvertAll(Split(s), int.Parse); }
public int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
public int[][] IntGrid(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
public string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
public string Line() { return reader.ReadLine().Trim(); }
private string[] Split(string s) { return s.Split(separator, removeOp); }
private bool Enqueue()
{
if (i < A.Length) return true;
string line = reader.ReadLine();
if (line == null) return false;
if (line == "") return Enqueue();
A = Split(line);
i = 0;
return true;
}
private string Dequeue() { Enqueue(); return A[i++]; }
}
eitaho