結果

問題 No.424 立体迷路
ユーザー 紙ぺーぱー紙ぺーぱー
提出日時 2016-09-24 20:16:00
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 25 ms / 2,000 ms
コード長 6,979 bytes
コンパイル時間 1,108 ms
コンパイル使用メモリ 113,152 KB
実行使用メモリ 17,664 KB
最終ジャッジ日時 2024-07-05 07:10:03
合計ジャッジ時間 2,585 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 5
other AC * 21
権限があれば一括ダウンロードができます
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

diff #
プレゼンテーションモードにする

using System;
using System.Linq;
using System.Linq.Expressions;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using System.Numerics;
using Number = System.Int64;
namespace Program
{
public class Solver
{
public void Solve()
{
var h = sc.Integer();
var w = sc.Integer();
var set = new DisjointSet(h * w);
var a = sc.Integer(2);
var b = sc.Integer(2);
var s = Enumerate(h, x => sc.Scan());
int[] dx = { 1, 0, -1, 0 };
int[] dy = { 0, 1, 0, -1 };
for (int i = 0; i < h; i++)
for (int j = 0; j < w; j++)
{
for (int k = 0; k < 4; k++)
{
{
var nx = i + dx[k];
var ny = j + dy[k];
if (nx < 0 || nx >= h || ny < 0 || ny >= w) continue;
var u = s[i][j] - '0';
var v = s[nx][ny] - '0';
if (Math.Abs(u - v) <= 1) set.Unite(i * w + j, nx * w + ny);
}
{
var nx = i + 2 * dx[k];
var ny = j + 2 * dy[k];
if (nx < 0 || nx >= h || ny < 0 || ny >= w) continue;
var u = s[i][j] - '0';
var v = s[nx][ny] - '0';
var r = s[(i + nx) / 2][(j + ny) / 2] - '0';
if (u == v && u > r) set.Unite(i * w + j, nx * w + ny);
}
}
}
for (int i = 0; i < 2; i++)
{
a[i]--; b[i]--;
}
if (set.IsUnited(a[0] * w + a[1], b[0] * w + b[1]))
IO.Printer.Out.WriteLine("YES");
else IO.Printer.Out.WriteLine("NO");
}
public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());
static T[] Enumerate<T>(int n, Func<int, T> f) { var a = new T[n]; for (int i = 0; i < n; ++i) a[i] = f(i); return a; }
static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; }
}
}
#region main
static class Ex
{
static public string AsString(this IEnumerable<char> ie) { return new string(System.Linq.Enumerable.ToArray(ie)); }
static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") { return string.Join(st, ie); }
static public void Main()
{
var solver = new Program.Solver();
solver.Solve();
Program.IO.Printer.Out.Flush();
}
}
#endregion
#region Ex
namespace Program.IO
{
using System.IO;
using System.Text;
using System.Globalization;
public class Printer: StreamWriter
{
static Printer() { Out = new Printer(Console.OpenStandardOutput()) { AutoFlush = false }; }
public static Printer Out { get; set; }
public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
public Printer(System.IO.Stream stream) : base(stream, new UTF8Encoding(false, true)) { }
public Printer(System.IO.Stream stream, Encoding encoding) : base(stream, encoding) { }
public void Write<T>(string format, T[] source) { base.Write(format, source.OfType<object>().ToArray()); }
public void WriteLine<T>(string format, T[] source) { base.WriteLine(format, source.OfType<object>().ToArray()); }
}
public class StreamScanner
{
public StreamScanner(Stream stream) { str = stream; }
public readonly Stream str;
private readonly byte[] buf = new byte[1024];
private int len, ptr;
public bool isEof = false;
public bool IsEndOfStream { get { return isEof; } }
private byte read()
{
if (isEof) return 0;
if (ptr >= len) { ptr = 0; if ((len = str.Read(buf, 0, 1024)) <= 0) { isEof = true; return 0; } }
return buf[ptr++];
}
public char Char() { byte b = 0; do b = read(); while ((b < 33 || 126 < b) && !isEof); return (char)b; }
public string Scan()
{
var sb = new StringBuilder();
for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
sb.Append(b);
return sb.ToString();
}
public string ScanLine()
{
var sb = new StringBuilder();
for (var b = Char(); b != '\n'; b = (char)read())
if (b == 0) break;
else if (b != '\r') sb.Append(b);
return sb.ToString();
}
public long Long()
{
if (isEof) return long.MinValue;
long ret = 0; byte b = 0; var ng = false;
do b = read();
while (b != 0 && b != '-' && (b < '0' || '9' < b));
if (b == 0) return long.MinValue;
if (b == '-') { ng = true; b = read(); }
for (; true; b = read())
{
if (b < '0' || '9' < b)
return ng ? -ret : ret;
else ret = ret * 10 + b - '0';
}
}
public int Integer() { return (isEof) ? int.MinValue : (int)Long(); }
public double Double() { var s = Scan(); return s != "" ? double.Parse(s, CultureInfo.InvariantCulture) : double.NaN; }
private T[] enumerate<T>(int n, Func<T> f)
{
var a = new T[n];
for (int i = 0; i < n; ++i) a[i] = f();
return a;
}
public char[] Char(int n) { return enumerate(n, Char); }
public string[] Scan(int n) { return enumerate(n, Scan); }
public double[] Double(int n) { return enumerate(n, Double); }
public int[] Integer(int n) { return enumerate(n, Integer); }
public long[] Long(int n) { return enumerate(n, Long); }
}
}
#endregion
#region DisjointSet
public class DisjointSet
{
int[] par;
byte[] rank;
public DisjointSet(int n)
{
par = new int[n];
for (int i = 0; i < n; i++)
par[i] = -1;
rank = new byte[n];
}
public int this[int id]
{
get
{
if ((par[id] < 0)) return id;
return par[id] = this[par[id]];
}
}
public bool Unite(int x, int y)
{
x = this[x]; y = this[y];
if (x == y) return false;
if (rank[x] < rank[y])
{
par[y] += par[x];
par[x] = y;
}
else
{
par[x] += par[y];
par[y] = x;
if (rank[x] == rank[y])
rank[x]++;
}
return true;
}
public int Size(int x) { return -par[this[x]]; }
public bool IsUnited(int x, int y) { return this[x] == this[y]; }
}
#endregion
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