結果

問題 No.5020 Averaging
ユーザー uwi
提出日時 2024-02-25 15:46:51
言語 C#
(.NET 8.0.404)
結果
AC  
実行時間 108 ms / 1,000 ms
コード長 5,162 bytes
コンパイル時間 8,905 ms
コンパイル使用メモリ 158,240 KB
実行使用メモリ 183,212 KB
スコア 21,917,887
最終ジャッジ日時 2024-02-25 15:47:08
合計ジャッジ時間 15,184 ms
ジャッジサーバーID
(参考情報)
judge13 / judge11
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ファイルパターン 結果
other AC * 50
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コンパイルメッセージ
  復元対象のプロジェクトを決定しています...
  /home/judge/data/code/main.csproj を復元しました (94 ms)。
MSBuild のバージョン 17.7.3+8ec440e68 (.NET)
  main -> /home/judge/data/code/bin/Release/net7.0/main.dll
  main -> /home/judge/data/code/bin/Release/net7.0/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.Reflection;
// TODO: 1
// 3
// a < b < c
// 2調
// a,b,c
// a,(b+c)/2
// (1/2,1/4,1/4) (0,1/2,1/2)
// (1/2,1/4,1/4) (1/4,3/8,3/8)
class Program
{
static void Main()
{
int n = ni();
long[][] co = nml(n);
long O = 500000000000000000L;
List<int[]> ret = new List<int[]>();
long lmin = O*2;
int argmin = -1;
for(int i = 0;i < n;i++){
long x = (co[0][0] + co[i][0]) / 2;
long y = (co[0][1] + co[i][1]) / 2;
long d = Math.Abs(x - O) + Math.Abs(y - O);
if(d < lmin){
lmin = d;
argmin = i;
}
}
if(argmin > 0){
long x = (co[0][0] + co[argmin][0]) / 2;
long y = (co[0][1] + co[argmin][1]) / 2;
co[0][0] = co[argmin][0] = x;
co[0][1] = co[argmin][1] = y;
ret.Add(new int[]{0, argmin});
}
long tx = O*2 - co[0][0];
long ty = O*2 - co[0][1];
long[][] sco = co.OrderBy(c => c[0]).ToArray();
int p = 0, q = n-1;
for(int i = 0;i < 4;i++){
List<long[]> ls = new List<long[]>();
for(int j = 0;j < 2;j++){
if(sco[p][2] == 0)p++;
ls.Add(sco[p++]);
}
for(int j = 0;j < 2;j++){
if(sco[q][2] == 0)q--;
ls.Add(sco[q--]);
}
double[] xs = new double[]{
Convert.ToDouble(ls[0][0]) - tx,
Convert.ToDouble(ls[1][0]) - tx,
Convert.ToDouble(ls[2][0]) - tx,
Convert.ToDouble(ls[3][0]) - tx
};
min = Double.PositiveInfinity;
simulate(xs, 10, new List<int>());
foreach(int ind in best){
long x = (ls[ind][0] + ls[ind+1][0]) / 2;
long y = (ls[ind][1] + ls[ind+1][1]) / 2;
ret.Add(new int[]{
Convert.ToInt32(ls[ind][2]),
Convert.ToInt32(ls[ind+1][2])
});
ls[ind][0] = ls[ind+1][0] = x;
ls[ind][1] = ls[ind+1][1] = y;
}
}
long[][] ysco = sco.OrderBy(c => Math.Abs(c[0] - tx)).ToArray();
List<long[]> ls2 = new List<long[]>();
for(int i = 0;i < n;i++){
if(ysco[i][2] == 0)continue;
ls2.Add(ysco[i]);
if(ls2.Count == 4)break;
}
long[][] sls = ls2.OrderBy(c => c[1]).ToArray();
double[] ys = new double[]{
Convert.ToDouble(ls2[0][1]) - ty,
Convert.ToDouble(ls2[1][1]) - ty,
Convert.ToDouble(ls2[2][1]) - ty,
Convert.ToDouble(ls2[3][1]) - ty
};
min = Double.PositiveInfinity;
simulate(ys, int.Min(14, 49 - ret.Count), new List<int>());
foreach(int ind in best){
long x = (ls2[ind][0] + ls2[ind+1][0]) / 2;
long y = (ls2[ind][1] + ls2[ind+1][1]) / 2;
ret.Add(new int[]{
Convert.ToInt32(ls2[ind][2]),
Convert.ToInt32(ls2[ind+1][2])
});
ls2[ind][0] = ls2[ind+1][0] = x;
ls2[ind][1] = ls2[ind+1][1] = y;
}
int arg = -1;
double vald = Double.PositiveInfinity;
for(int i = 0;i < n;i++){
if(co[i][2] == 0)continue;
double d = Math.Max(Math.Abs(co[i][0] - tx), Math.Abs(co[i][1] - ty));
if(d < vald){
vald = d;
arg = i;
}
}
ret.Add(new int[]{0, (int)co[arg][2]});
Console.WriteLine(ret.Count);
foreach(int[] r in ret){
Console.WriteLine($"{r[0]+1} {r[1]+1}");
}
}
static double min;
static List<int> best = new List<int>();
static void simulate(double[] a, int rem, List<int> route)
{
for(int i = 0;i < 4;i++){
if(Math.Abs(a[i]) < min){
min = Math.Abs(a[i]);
best = new List<int>(route);
}
}
if(rem == 0)return;
for(int i = 0;i < 3;i++){
if(a[i] == a[i+1])continue;
double[] b = (double[])a.Clone();
double v = (b[i] + b[i+1]) / 2;
b[i] = b[i+1] = v;
route.Add(i);
simulate(b, rem-1, route);
route.RemoveAt(route.Count-1);
}
}
static string ns()
{
return Console.ReadLine();
}
static int ni()
{
return Convert.ToInt32(ns());
}
static int[] na()
{
return ns().Split(' ').Select(int.Parse).ToArray();
}
static long[] nal()
{
return ns().Split(' ').Select(long.Parse).ToArray();
}
static long[][] nml(int n)
{
long[][] ret = new long[n][];
for (int i = 0; i < n; i++)
{
long[] f = nal();
ret[i] = new long[]{f[0], f[1], i};
}
return ret;
}
}
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