結果
| 問題 |
No.124 門松列(3)
|
| コンテスト | |
| ユーザー |
eitaho
|
| 提出日時 | 2015-01-11 23:52:34 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,104 bytes |
| コンパイル時間 | 1,047 ms |
| コンパイル使用メモリ | 118,548 KB |
| 実行使用メモリ | 29,324 KB |
| 最終ジャッジ日時 | 2024-06-22 03:58:36 |
| 合計ジャッジ時間 | 3,085 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 22 WA * 4 |
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.Text;
using System.Linq;
using System.Diagnostics;
using System.Collections.Generic;
using Enu = System.Linq.Enumerable;
class Program
{
static readonly int[] dr = { 0, 0, -1, 1 };
static readonly int[] dc = { -1, 1, 0, 0 };
static readonly int INF = (int)1e9;
int H, W;
void Solve()
{
W = reader.Int();
H = reader.Int();
var grid = reader.IntGrid(H);
var que = new Queue<State>();
var minCost = new int[H, W, 2];
Fill(minCost, INF);
minCost[0, 0, 0] = minCost[0, 0, 1] = 0;
que.Enqueue(new State(-1, grid[0][0], 0, 0, 0));
while (que.Count > 0)
{
var s = que.Dequeue();
if (s.r == H - 1 && s.c == W - 1)
{
Console.WriteLine(s.steps);
return;
}
for (int d = 0; d < dr.Length; d++)
{
int nr = s.r + dr[d], nc = s.c + dc[d];
if (OK(s, nr, nc, grid))
{
int b = (s.prev1 > grid[nr][nc]) ? 0 : 1;
if (s.steps + 1 < minCost[nr, nc, b])
{
minCost[nr, nc, b] = s.steps + 1;
que.Enqueue(new State(s.prev1, grid[nr][nc], nr, nc, s.steps + 1));
}
}
}
}
Console.WriteLine(-1);
}
private bool OK(State s, int nr, int nc, int[][] grid)
{
if (!IsInside(nr, nc)) return false;
if (s.steps < 1) return true;
int x = grid[nr][nc];
if (s.prev2 == x || s.prev1 == x) return false;
var sorted = new[] { s.prev2, s.prev1, x };
Array.Sort(sorted);
return sorted[1] == s.prev2 || sorted[1] == x;
}
bool IsInside(int r, int c) { return r >= 0 && r < H && c >= 0 && c < W; }
struct State
{
public short prev2, prev1, r, c;
public int steps;
public State(int p2, int p1, int r, int c, int step)
{
prev2 = (short)p2; prev1 = (short)p1; this.r = (short)r; this.c = (short)c; steps = step;
}
}
void Fill<T>(T[, ,] a, T val)
{
for (int i = 0; i < a.GetLength(0); i++)
for (int j = 0; j < a.GetLength(1); j++)
for (int k = 0; k < a.GetLength(2); k++)
a[i, j, k] = val;
}
static void Main() { new Program().Solve(); }
Reader reader = new Reader(Console.In);
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 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 Enumerable.Range(0, N).Select(i => Int()).ToArray(); }
public int[][] IntGrid(int H) { return Enumerable.Range(0, H).Select(i => IntLine()).ToArray(); }
public string[] StringArray(int N) { return Enumerable.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