結果

問題 No.5007 Steiner Space Travel
ユーザー yupiteru_kun
提出日時 2022-07-30 16:23:01
言語 C#
(.NET 8.0.404)
結果
AC  
実行時間 654 ms / 1,000 ms
コード長 15,461 bytes
コンパイル時間 6,911 ms
実行使用メモリ 175,112 KB
スコア 6,338,405
最終ジャッジ日時 2022-07-30 16:23:31
合計ジャッジ時間 29,130 ms
ジャッジサーバーID
(参考情報)
judge11 / judge13
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ファイルパターン 結果
other AC * 30
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コンパイルメッセージ
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  Restored /home/judge/data/code/main.csproj (in 109 ms).
.NET 向け Microsoft (R) Build Engine バージョン 17.0.0-preview-21470-01+cb055d28f
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  プレビュー版の .NET を使用しています。https://aka.ms/dotnet-core-preview をご覧ください
  main -> /home/judge/data/code/bin/Release/net6.0/main.dll
  main -> /home/judge/data/code/bin/Release/net6.0/publish/

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.Collections.Generic;
using System.IO;
using System.Linq;
using static System.Math;
using System.Text;
using System.Threading;
using System.Globalization;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using Library;
namespace Program
{
public static class ProblemA
{
static bool SAIKI = false;
static public int numberOfRandomCases = 0;
static public void MakeTestCase(List<string> _input, List<string> _output, ref Func<string[], bool> _outputChecker)
{
}
static public void Solve()
{
var startTime = DateTime.Now;
var N = (int)NN;
var M = (int)NN;
(int x, int y)[] ab = Repeat(0, N).Select(_ => ((int)NN, (int)NN)).Concat(Repeat(0, M).Select(_ => (0, 0))).ToArray();
var A = 5;
Func<int, int, long> calcDist = (f, t) =>
{
var fromX = 0;
var fromY = 0;
var toX = 0;
var toY = 0;
var fromCoef = 1L;
var toCoef = 1L;
if (f > N)
{
fromX = ab[f + N - 1].x;
fromY = ab[f + N - 1].y;
}
else
{
fromX = ab[f - 1].x;
fromY = ab[f - 1].y;
fromCoef = A;
}
if (t > N)
{
toX = ab[t + N - 1].x;
toY = ab[t + N - 1].y;
}
else
{
toX = ab[t - 1].x;
toY = ab[t - 1].y;
toCoef = A;
}
return fromCoef * toCoef * ((fromX - toX) * (fromX - toX) + (fromY - toY) * (fromY - toY));
};
var grid = new int[1001, 1001];
var pathList = new List<(int from, int to)>();
for (var i = 0; i < N; ++i)
{
grid[ab[i].x, ab[i].y] = i + 1;
}
var score = 0L;
{
var done = new bool[N + 1];
var from = 1;
done[from] = true;
for (var i = 1; i < N; ++i)
{
var minDist = long.MaxValue;
var minNum = 0;
for (var j = 1; j <= N; ++j)
{
if (done[j]) continue;
if (minDist.Chmin(calcDist(from, j)))
{
minNum = j;
}
}
score += minDist;
pathList.Add((from, minNum));
from = minNum;
done[from] = true;
}
score += calcDist(from, 1);
pathList.Add((from, 1));
}
var hasEdge = ab.Select(_ =>
{
var ret = new int[2];
ret[0] = ret[1] = -1;
return ret;
}).ToArray();
for (var i = 0; i < pathList.Count; ++i)
{
if (hasEdge[pathList[i].from - 1][0] == -1) hasEdge[pathList[i].from - 1][0] = i;
else hasEdge[pathList[i].from - 1][1] = i;
if (hasEdge[pathList[i].to - 1][0] == -1) hasEdge[pathList[i].to - 1][0] = i;
else hasEdge[pathList[i].to - 1][1] = i;
}
while ((DateTime.Now - startTime).TotalMilliseconds < 600)
{
var p1 = (int)(xorshift % pathList.Count);
var p2 = (int)(xorshift % (pathList.Count - 1));
if (p2 >= p1) ++p2;
if (pathList[p1].from == pathList[p2].from || pathList[p1].from == pathList[p2].to ||
pathList[p1].to == pathList[p2].from || pathList[p1].to == pathList[p2].to)
{
continue;
}
var goal = 0;
{
var from = pathList[p1].from;
goal = pathList[p1].to;
while (true)
{
if (goal == pathList[p2].from || goal == pathList[p2].to) break;
var to = 0;
var pos1 = pathList[hasEdge[goal - 1][0]];
var pos2 = pathList[hasEdge[goal - 1][1]];
if (pos1.from == from || pos1.to == from)
{
if (pos2.from == goal) to = pos2.to;
else to = pos2.from;
}
else
{
if (pos1.from == goal) to = pos1.to;
else to = pos1.from;
}
from = goal;
goal = to;
}
}
var newScore = score;
newScore -= calcDist(pathList[p1].from, pathList[p1].to);
newScore -= calcDist(pathList[p2].from, pathList[p2].to);
if (goal == pathList[p2].from)
{
newScore += calcDist(pathList[p1].from, pathList[p2].from);
newScore += calcDist(pathList[p2].to, pathList[p1].to);
if (newScore < score)
{
score = newScore;
if (hasEdge[pathList[p1].to - 1][0] == p1)
{
hasEdge[pathList[p1].to - 1][0] = p2;
}
else
{
hasEdge[pathList[p1].to - 1][1] = p2;
}
if (hasEdge[pathList[p2].from - 1][0] == p2)
{
hasEdge[pathList[p2].from - 1][0] = p1;
}
else
{
hasEdge[pathList[p2].from - 1][1] = p1;
}
var newp1 = (pathList[p1].from, pathList[p2].from);
var newp2 = (pathList[p2].to, pathList[p1].to);
pathList[p1] = newp1;
pathList[p2] = newp2;
}
}
else
{
newScore += calcDist(pathList[p1].from, pathList[p2].to);
newScore += calcDist(pathList[p2].from, pathList[p1].to);
if (newScore < score)
{
score = newScore;
if (hasEdge[pathList[p1].to - 1][0] == p1)
{
hasEdge[pathList[p1].to - 1][0] = p2;
}
else
{
hasEdge[pathList[p1].to - 1][1] = p2;
}
if (hasEdge[pathList[p2].to - 1][0] == p2)
{
hasEdge[pathList[p2].to - 1][0] = p1;
}
else
{
hasEdge[pathList[p2].to - 1][1] = p1;
}
var newp1 = (pathList[p1].from, pathList[p2].to);
var newp2 = (pathList[p2].from, pathList[p1].to);
pathList[p1] = newp1;
pathList[p2] = newp2;
}
}
}
{
for (var i = 0; i < M; ++i)
{
Console.WriteLine($"{ab[i + N].x} {ab[i + N].y}");
}
Console.WriteLine(pathList.Count + 1);
var from = -1;
var now = 1;
Console.WriteLine($"1 1");
for (var i = 0; i < pathList.Count; ++i)
{
var to = 0;
var p1 = pathList[hasEdge[now - 1][0]];
var p2 = pathList[hasEdge[now - 1][1]];
if (p1.from == from || p1.to == from)
{
if (p2.from == now) to = p2.to;
else to = p2.from;
}
else
{
if (p1.from == now) to = p1.to;
else to = p1.from;
}
from = now;
now = to;
Console.WriteLine($"1 {now}");
}
}
}
class Printer : StreamWriter
{
public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
public Printer(Stream stream) : base(stream, new UTF8Encoding(false, true)) { base.AutoFlush = false; }
public Printer(Stream stream, Encoding encoding) : base(stream, encoding) { base.AutoFlush = false; }
}
static LIB_FastIO fastio = new LIB_FastIODebug();
static public void Main(string[] args) { if (args.Length == 0) { fastio = new LIB_FastIO(); Console.SetOut(new Printer(Console
            .OpenStandardOutput())); } if (SAIKI) { var t = new Thread(Solve, 134217728); t.Start(); t.Join(); } else Solve(); Console.Out.Flush(); }
static long NN => fastio.Long();
static double ND => fastio.Double();
static string NS => fastio.Scan();
static long[] NNList(long N) => Repeat(0, N).Select(_ => NN).ToArray();
static double[] NDList(long N) => Repeat(0, N).Select(_ => ND).ToArray();
static string[] NSList(long N) => Repeat(0, N).Select(_ => NS).ToArray();
static long Count<T>(this IEnumerable<T> x, Func<T, bool> pred) => Enumerable.Count(x, pred);
static IEnumerable<T> Repeat<T>(T v, long n) => Enumerable.Repeat<T>(v, (int)n);
static IEnumerable<int> Range(long s, long c) => Enumerable.Range((int)s, (int)c);
static IOrderedEnumerable<T> OrderByRand<T>(this IEnumerable<T> x) => Enumerable.OrderBy(x, _ => xorshift);
static IOrderedEnumerable<T> OrderBy<T>(this IEnumerable<T> x) => Enumerable.OrderBy(x.OrderByRand(), e => e);
static IOrderedEnumerable<T1> OrderBy<T1, T2>(this IEnumerable<T1> x, Func<T1, T2> selector) => Enumerable.OrderBy(x.OrderByRand(), selector
            );
static IOrderedEnumerable<T> OrderByDescending<T>(this IEnumerable<T> x) => Enumerable.OrderByDescending(x.OrderByRand(), e => e);
static IOrderedEnumerable<T1> OrderByDescending<T1, T2>(this IEnumerable<T1> x, Func<T1, T2> selector) => Enumerable.OrderByDescending(x
            .OrderByRand(), selector);
static IOrderedEnumerable<string> OrderBy(this IEnumerable<string> x) => x.OrderByRand().OrderBy(e => e, StringComparer.OrdinalIgnoreCase);
static IOrderedEnumerable<T> OrderBy<T>(this IEnumerable<T> x, Func<T, string> selector) => x.OrderByRand().OrderBy(selector, StringComparer
            .OrdinalIgnoreCase);
static IOrderedEnumerable<string> OrderByDescending(this IEnumerable<string> x) => x.OrderByRand().OrderByDescending(e => e, StringComparer
            .OrdinalIgnoreCase);
static IOrderedEnumerable<T> OrderByDescending<T>(this IEnumerable<T> x, Func<T, string> selector) => x.OrderByRand().OrderByDescending
            (selector, StringComparer.OrdinalIgnoreCase);
static string Join<T>(this IEnumerable<T> x, string separator = "") => string.Join(separator, x);
static uint xorshift { get { _xsi.MoveNext(); return _xsi.Current; } }
static IEnumerator<uint> _xsi = _xsc();
static IEnumerator<uint> _xsc() { uint x = 123456789, y = 362436069, z = 521288629, w = (uint)(DateTime.Now.Ticks & 0xffffffff); while (true)
            { var t = x ^ (x << 11); x = y; y = z; z = w; w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)); yield return w; } }
static bool Chmax<T>(this ref T lhs, T rhs) where T : struct, IComparable<T> { if (lhs.CompareTo(rhs) < 0) { lhs = rhs; return true; } return
            false; }
static bool Chmin<T>(this ref T lhs, T rhs) where T : struct, IComparable<T> { if (lhs.CompareTo(rhs) > 0) { lhs = rhs; return true; } return
            false; }
static void Fill<T>(this T[] array, T value) => array.AsSpan().Fill(value);
static void Fill<T>(this T[,] array, T value) => MemoryMarshal.CreateSpan(ref array[0, 0], array.Length).Fill(value);
static void Fill<T>(this T[,,] array, T value) => MemoryMarshal.CreateSpan(ref array[0, 0, 0], array.Length).Fill(value);
static void Fill<T>(this T[,,,] array, T value) => MemoryMarshal.CreateSpan(ref array[0, 0, 0, 0], array.Length).Fill(value);
}
}
namespace Library {
class LIB_FastIO
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public LIB_FastIO() { str = Console.OpenStandardInput(); }
readonly Stream str;
readonly byte[] buf = new byte[2048];
int len, ptr;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
byte read()
{
if (ptr >= len)
{
ptr = 0;
if ((len = str.Read(buf, 0, 2048)) <= 0)
{
return 0;
}
}
return buf[ptr++];
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
char Char()
{
byte b = 0;
do b = read();
while (b < 33 || 126 < b);
return (char)b;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
virtual public string Scan()
{
var sb = new StringBuilder();
for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
sb.Append(b);
return sb.ToString();
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
virtual public long Long()
{
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 << 3) + (ret << 1) + b - '0';
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
virtual public double Double() { return double.Parse(Scan(), CultureInfo.InvariantCulture); }
}
class LIB_FastIODebug : LIB_FastIO
{
Queue<string> param = new Queue<string>();
[MethodImpl(MethodImplOptions.AggressiveInlining)]
string NextString() { if (param.Count == 0) foreach (var item in Console.ReadLine().Split(' ')) param.Enqueue(item); return param.Dequeue();
            }
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public LIB_FastIODebug() { }
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public override string Scan() => NextString();
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public override long Long() => long.Parse(NextString());
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public override double Double() => double.Parse(NextString());
}
}
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