結果

問題 No.1065 電柱 / Pole (Easy)
ユーザー bluemeganebluemegane
提出日時 2021-05-03 11:22:47
言語 C#(csc)
(csc 3.9.0)
結果
RE  
実行時間 -
コード長 4,553 bytes
コンパイル時間 2,309 ms
コンパイル使用メモリ 63,816 KB
実行使用メモリ 71,592 KB
最終ジャッジ日時 2023-09-29 05:55:16
合計ジャッジ時間 20,985 ms
ジャッジサーバーID
（参考情報） 		judge12 / judge13
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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 62 ms
22,624 KB
testcase_01 AC 62 ms
22,824 KB
testcase_02 AC 377 ms
51,312 KB
testcase_03 AC 547 ms
66,652 KB
testcase_04 AC 549 ms
66,384 KB
testcase_05 AC 410 ms
65,476 KB
testcase_06 AC 409 ms
65,412 KB
testcase_07 AC 166 ms
37,684 KB
testcase_08 AC 486 ms
71,592 KB
testcase_09 AC 97 ms
32,328 KB
testcase_10 AC 243 ms
48,716 KB
testcase_11 AC 182 ms
39,460 KB
testcase_12 AC 155 ms
36,340 KB
testcase_13 AC 403 ms
50,312 KB
testcase_14 AC 464 ms
60,740 KB
testcase_15 AC 548 ms
63,344 KB
testcase_16 RE -
testcase_17 AC 613 ms
64,412 KB
testcase_18 RE -
testcase_19 AC 599 ms
63,844 KB
testcase_20 AC 184 ms
36,672 KB
testcase_21 RE -
testcase_22 AC 517 ms
63,520 KB
testcase_23 AC 67 ms
24,704 KB
testcase_24 AC 66 ms
20,572 KB
testcase_25 AC 142 ms
36,888 KB
testcase_26 AC 308 ms
48,656 KB
testcase_27 AC 318 ms
47,184 KB
testcase_28 AC 504 ms
62,208 KB
testcase_29 AC 109 ms
30,372 KB
testcase_30 AC 581 ms
66,164 KB
testcase_31 AC 391 ms
53,960 KB
testcase_32 AC 272 ms
44,908 KB
testcase_33 RE -
testcase_34 AC 221 ms
42,356 KB
testcase_35 AC 588 ms
66,364 KB
testcase_36 AC 66 ms
24,752 KB
testcase_37 AC 67 ms
24,712 KB
testcase_38 AC 65 ms
22,808 KB
testcase_39 AC 67 ms
20,628 KB
testcase_40 AC 65 ms
22,948 KB
testcase_41 AC 777 ms
69,488 KB
testcase_42 AC 230 ms
39,624 KB
testcase_43 AC 389 ms
52,584 KB
testcase_44 AC 162 ms
38,240 KB
testcase_45 AC 381 ms
49,952 KB
testcase_46 AC 59 ms
22,784 KB
testcase_47 AC 61 ms
22,956 KB
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ソースコード

diff # 

using static System.Math;
using System.Collections.Generic;
using System;

public class PriorityQueue<T> where T : IComparable
{
    private IComparer<T> _comparer = null;
    private int _type = 0;
    private T[] _heap;
    private int _sz = 0;
    private int _count = 0;
    public PriorityQueue(int maxSize, IComparer<T> comparer)
    {
        _heap = new T[maxSize];
        _comparer = comparer;
    }
    public PriorityQueue(int maxSize, int type = 0)
    {
        _heap = new T[maxSize];
        _type = type;
    }
    private int Compare(T x, T y)
    {
        if (_comparer != null) return _comparer.Compare(x, y);
        return _type == 0 ? x.CompareTo(y) : y.CompareTo(x);
    }
    public void Push(T x)
    {
        _count++;
        var i = _sz++;
        while (i > 0)
        {
            var p = (i - 1) / 2;

            if (Compare(_heap[p], x) <= 0) break;

            _heap[i] = _heap[p];
            i = p;
        }
        _heap[i] = x;
    }
    public T Pop()
    {
        _count--;
        T ret = _heap[0];
        T x = _heap[--_sz];

        int i = 0;
        while (i * 2 + 1 < _sz)
        {
            int a = i * 2 + 1;
            int b = i * 2 + 2;

            if (b < _sz && Compare(_heap[b], _heap[a]) < 0) a = b;

            if (Compare(_heap[a], x) >= 0) break;

            _heap[i] = _heap[a];
            i = a;
        }
        _heap[i] = x;
        return ret;
    }
    public int Count()
    {
        return _count;
    }
    public T Peek()
    {
        return _heap[0];
    }
    public bool Contains(T x)
    {
        for (int i = 0; i < _sz; i++) if (x.Equals(_heap[i])) return true;
        return false;
    }
    public void Clear()
    {
        while (this.Count() > 0) this.Pop();
    }
    public IEnumerator<T> GetEnumerator()
    {
        var ret = new List<T>();
        while (this.Count() > 0)
        {
            ret.Add(this.Pop());
        }
        foreach (var r in ret)
        {
            this.Push(r);
            yield return r;
        }
    }
    public T[] ToArray()
    {
        T[] array = new T[_sz];
        int i = 0;
        foreach (var r in this)
        {
            array[i++] = r;
        }
        return array;
    }
}
public class Edge
{
    public int to { get; set; }
    public double d { get; set; }
}
public class Node : IComparable
{
    public int id { get; set; }
    public double d { get; set; }
    public int CompareTo(object obj)
    {
        var x = (Node)obj;
        if (this.d > x.d) return 1;
        else if (this.d == x.d) return 0;
        else return -1;
    }
}

public class P
{
    public int x { get; set; }
    public int y { get; set; }
}

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var m = int.Parse(line[1]);
        line = Console.ReadLine().Trim().Split(' ');
        var r = int.Parse(line[0]) - 1;
        var r2 = int.Parse(line[1]) - 1;
        var ps = new P[n];
        var aa = new List<Edge>[n];
        for (int i = 0; i < n; i++)
        {
            line = Console.ReadLine().Trim().Split(' ');
            ps[i] = new P { x = int.Parse(line[0]), y = int.Parse(line[1]) };
            aa[i] = new List<Edge>();
        }
        for (int i = 0; i < m; i++)
        {
            line = Console.ReadLine().Trim().Split(' ');
            var p = int.Parse(line[0]) - 1;
            var q = int.Parse(line[1]) - 1;
            var wd = Sqrt((ps[p].x - ps[q].x) * (ps[p].x - ps[q].x) + (ps[p].y - ps[q].y) *
                (ps[p].y - ps[q].y));
            aa[p].Add(new Edge { to = q, d = wd });
            aa[q].Add(new Edge { to = p, d = wd });
        }
        var mind = new double[n];
        for (int i = 0; i < n; i++) mind[i] = 100000000000d;
        goDijk(aa, r, n, mind);
        Console.WriteLine(mind[r2]);
    }
    public static void goDijk(List<Edge>[] aa, int r, int n, double[] mind)
    {
        var pq = new PriorityQueue<Node>(n + 1000, 0);
        pq.Push(new Node { id = r, d = 0 });
        while (pq.Count() > 0)
        {
            var targ = pq.Pop();
            var nowd = targ.d;
            var nowid = targ.id;
            if (mind[nowid] < nowd) continue;
            mind[nowid] = nowd;
            foreach (var x in aa[nowid])
                if (nowd + x.d < mind[x.to])
                {
                    mind[x.to] = nowd + x.d;
                    pq.Push(new Node { id = x.to, d = nowd + x.d });
                }

        }
    }
}
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