結果
| 問題 | No.20 砂漠のオアシス |
| ユーザー |
 紙ぺーぱー
|
| 提出日時 | 2015-01-17 16:59:07 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 53 ms / 5,000 ms |
| コード長 | 7,817 bytes |
| コンパイル時間 | 1,248 ms |
| コンパイル使用メモリ | 112,512 KB |
| 実行使用メモリ | 21,704 KB |
| 最終ジャッジ日時 | 2024-10-13 05:00:16 |
| 合計ジャッジ時間 | 2,531 ms |
|
ジャッジサーバーID （参考情報） |
judge3 / judge2 |
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テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 22 ms
17,536 KB |
| testcase_01 | AC | 22 ms
17,664 KB |
| testcase_02 | AC | 21 ms
17,408 KB |
| testcase_03 | AC | 23 ms
17,536 KB |
| testcase_04 | AC | 23 ms
17,920 KB |
| testcase_05 | AC | 38 ms
21,376 KB |
| testcase_06 | AC | 25 ms
17,880 KB |
| testcase_07 | AC | 53 ms
21,704 KB |
| testcase_08 | AC | 31 ms
18,816 KB |
| testcase_09 | AC | 48 ms
21,596 KB |
| testcase_10 | AC | 22 ms
17,408 KB |
| testcase_11 | AC | 22 ms
17,152 KB |
| testcase_12 | AC | 24 ms
17,408 KB |
| testcase_13 | AC | 25 ms
17,280 KB |
| testcase_14 | AC | 26 ms
18,048 KB |
| testcase_15 | AC | 25 ms
17,920 KB |
| testcase_16 | AC | 28 ms
18,176 KB |
| testcase_17 | AC | 26 ms
18,304 KB |
| testcase_18 | AC | 27 ms
18,048 KB |
| testcase_19 | AC | 27 ms
18,304 KB |
| testcase_20 | AC | 23 ms
17,408 KB |
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.Linq;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
//using System.Numerics;
namespace Program
{
public class Solver
{
public void Solve()
{
var n = sc.Integer();
var hp = sc.Integer();
var w = sc.Integer() - 1;
var h = sc.Integer() - 1;
var map = Enumerate(n, x => sc.Integer(n));
var dist = new int[n, n];
dist[0, 0] = hp;
var pq = new MergeablePriorityQueue<KeyValuePair<int, int>>((l,r)=>r.Value.CompareTo(l.Value));
pq.Enqueue(new KeyValuePair<int, int>(0, hp));
int[] dx = { -1, 1, 0, 0 };
int[] dy = { 0, 0, 1, -1 };
Action run = () =>
{
while (pq.Any())
{
var p = pq.Dequeue();
var r = p.Key / n;
var c = p.Key % n;
if (dist[r, c] > p.Value) continue;
for (int i = 0; i < 4; i++)
{
var nx = r + dx[i];
var nc = c + dy[i];
if (nx < 0 || nx >= n || nc < 0 || nc >= n) continue;
if (dist[nx, nc] < p.Value - map[nx][nc])
{
dist[nx, nc] = p.Value - map[nx][nc];
pq.Enqueue(new KeyValuePair<int, int>(nx * n + nc, dist[nx, nc]));
}
}
}
};
run();
if (w >= 0 && h >= 0)
pq.Enqueue(new KeyValuePair<int, int>(h * n + w, dist[h, w] * 2));
run();
if(dist[n-1,n-1]>0)
IO.Printer.Out.WriteLine("YES");
else IO.Printer.Out.WriteLine("NO");
}
internal IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());
static 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; }
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; }
}
}
#region Ex
namespace Program.IO
{
using System.IO;
using System.Linq;
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 System.Globalization.CultureInfo.InvariantCulture; } }
public Printer(System.IO.Stream stream) : base(stream, new System.Text.UTF8Encoding(false, true)) { }
public void Write<T>(string format, IEnumerable<T> source) { base.Write(format, source.OfType<object>().ToArray()); }
public void WriteLine<T>(string format, IEnumerable<T> source) { base.WriteLine(format, source.OfType<object>().ToArray()); }
}
public class StreamScanner
{
public StreamScanner(Stream stream) { str = stream; }
private 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); return (char)b; }
public char[] Char(int n) { var a = new char[n]; for (int i = 0; i < n; i++) a[i] = Char(); return a; }
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 long Long()
{
if (isEof) return long.MinValue;
long ret = 0; byte b = 0; var ng = false;
do b = read();
while (b != '-' && (b < '0' || '9' < b));
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() { return double.Parse(Scan(), System.Globalization.CultureInfo.InvariantCulture); }
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 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); }
public void Flush() { str.Flush(); }
}
}
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 PriorityQueue and PairingHeap
public class MergeablePriorityQueue<T>
{
PairingHeap<T> top;
Comparison<T> compare;
int size;
public int Count { get { return size; } }
public MergeablePriorityQueue() : this(Comparer<T>.Default) { }
public MergeablePriorityQueue(Comparison<T> comparison) { compare = comparison; }
public MergeablePriorityQueue(IComparer<T> comparer) { compare = comparer.Compare; }
public void Enqueue(T item)
{
var heap = new PairingHeap<T>(item);
top = PairingHeap<T>.Merge(top, heap, compare);
size++;
}
public T Dequeue()
{
var ret = top.Key;
size--;
top = PairingHeap<T>.Pop(top, compare);
return ret;
}
public bool Any() { return size > 0; }
public T Peek() { return top.Key; }
}
#region PairingHeap
public class PairingHeap<T>
{
public PairingHeap(T k) { key = k; }
private readonly T key;
public T Key { get { return key; } }
private PairingHeap<T> head;
private PairingHeap<T> next;
static public PairingHeap<T> Pop(PairingHeap<T> s, Comparison<T> compare)
{
return MergeLst(s.head, compare);
}
static public PairingHeap<T> Merge(PairingHeap<T> l, PairingHeap<T> r, Comparison<T> compare)
{
if (l == null || r == null) return l == null ? r : l;
if (compare(l.key, r.key) > 0) Swap(ref l, ref r);
r.next = l.head;
l.head = r;
return l;
}
static public PairingHeap<T> MergeLst(PairingHeap<T> s, Comparison<T> compare)
{
var n = new PairingHeap<T>(default(T));
while (s != null)
{
PairingHeap<T> a = s, b = null;
s = s.next; a.next = null;
if (s != null) { b = s; s = s.next; b.next = null; }
a = Merge(a, b, compare); a.next = n.next;
n.next = a;
}
while (n.next != null)
{
var j = n.next;
n.next = n.next.next;
s = Merge(j, s, compare);
}
return s;
}
static void Swap(ref PairingHeap<T> l, ref PairingHeap<T> r) { var t = l; l = r; r = t; }
}
#endregion
#endregion