結果
| 問題 |
No.3056 Disconnected Coloring
|
| ユーザー |
 KumaTachiRen
|
| 提出日時 | 2025-03-14 21:41:55 |
| 言語 | C# (.NET 8.0.404) |
| 結果 |
AC
|
| 実行時間 | 75 ms / 2,000 ms |
| コード長 | 7,970 bytes |
| コンパイル時間 | 8,691 ms |
| コンパイル使用メモリ | 168,552 KB |
| 実行使用メモリ | 192,060 KB |
| 最終ジャッジ日時 | 2025-03-14 21:42:12 |
| 合計ジャッジ時間 | 14,171 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 34 |
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 (113 ミリ秒)。 main -> /home/judge/data/code/bin/Release/net8.0/main.dll main -> /home/judge/data/code/bin/Release/net8.0/publish/
ソースコード
using Lib;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using static Lib.OutputLib;
public class Solver
{
const bool MultiTestCase = false;
void Solve()
{
int n = ri, m = ri;
var es = new (int u, int v)[m];
for (int i = 0; i < m; i++) es[i] = (ri - 1, ri - 1);
if (m % 2 != 0)
{
Write(-1);
return;
}
int deg0 = 0, deg1 = 0;
foreach (var (u, v) in es)
{
if ((u, v) == (0, n - 1))
{
Write(-1);
return;
}
if (u == 0) deg0++;
if (v == n - 1) deg1++;
}
var ans = new char[m];
Array.Fill(ans, '.');
if (Math.Max(deg0, deg1) <= m / 2)
{
for (int i = 0; i < m; i++)
{
var (u, v) = es[i];
if (u == 0) ans[i] = 'R';
if (v == n - 1) ans[i] = 'B';
}
int r = m / 2 - deg0;
for (int i = 0; i < m; i++)
if (ans[i] == '.') ans[i] = r-- > 0 ? 'R' : 'B';
}
else if (deg0 < deg1)
{
var f = new bool[n];
int r = m / 2, b = m / 2;
for (int i = 0; i < m; i++)
{
var (u, v) = es[i];
if (u == 0)
{
ans[i] = 'R';
r--;
f[v] = true;
}
}
for (int i = 0; i < m; i++)
{
var (u, v) = es[i];
if (v == n - 1 && f[u])
{
ans[i] = 'B';
b--;
}
}
for (int i = 0; i < m; i++)
{
var (u, v) = es[i];
if (v == n - 1 && ans[i] == '.')
ans[i] = r-- > 0 ? 'R' : 'B';
}
for (int i = 0; i < m; i++)
if (ans[i] == '.') ans[i] = r-- > 0 ? 'R' : 'B';
}
else
{
var f = new bool[n];
int r = m / 2, b = m / 2;
for (int i = 0; i < m; i++)
{
var (u, v) = es[i];
if (v == n - 1)
{
ans[i] = 'R';
r--;
f[u] = true;
}
}
for (int i = 0; i < m; i++)
{
var (u, v) = es[i];
if (u == 0 && f[v])
{
ans[i] = 'B';
b--;
}
}
for (int i = 0; i < m; i++)
{
var (u, v) = es[i];
if (u == 0 && ans[i] == '.')
ans[i] = r-- > 0 ? 'R' : 'B';
}
for (int i = 0; i < m; i++)
if (ans[i] == '.') ans[i] = r-- > 0 ? 'R' : 'B';
}
WriteJoin("", ans);
}
#pragma warning disable CS0162, CS8618
public Solver() { if (!MultiTestCase) Solve(); else for (int t = ri; t > 0; t--) Solve(); }
#pragma warning restore CS0162, CS8618
const int IINF = 1 << 30;
const long INF = 1L << 60;
int ri { [MethodImpl(256)] get => (int)sc.Integer(); }
long rl { [MethodImpl(256)] get => sc.Integer(); }
uint rui { [MethodImpl(256)] get => (uint)sc.UInteger(); }
ulong rul { [MethodImpl(256)] get => sc.UInteger(); }
double rd { [MethodImpl(256)] get => sc.Double(); }
string rs { [MethodImpl(256)] get => sc.Scan(); }
string rline { [MethodImpl(256)] get => sc.Line(); }
public StreamScanner sc = new StreamScanner(Console.OpenStandardInput());
void ReadArray(out int[] a, int n) { a = new int[n]; for (int i = 0; i < a.Length; i++) a[i] = ri; }
void ReadArray(out long[] a, int n) { a = new long[n]; for (int i = 0; i < a.Length; i++) a[i] = rl; }
void ReadArray<T>(out T[] a, int n, Func<T> read) { a = new T[n]; for (int i = 0; i < a.Length; i++) a[i] = read(); }
void ReadArray<T>(out T[] a, int n, Func<int, T> read) { a = new T[n]; for (int i = 0; i < a.Length; i++) a[i] = read(i); }
}
static class Program
{
static public void Main(string[] args)
{
SourceExpander.Expander.Expand();
Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false });
new Solver();
Console.Out.Flush();
}
}
#region Expanded by https://github.com/kzrnm/SourceExpander
namespace Lib{public partial 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;}}[MethodImpl(256)]private byte Read(){if(isEof)throw new EndOfStreamException();if(ptr>=len){ptr=0;if((len=str.Read(buf,0,1024))<=0){isEof=true;return 0;}}return buf[ptr++];}[MethodImpl(256)]public char Char(){byte b;do b=Read();while(b<33||126<b);return(char)b;}[MethodImpl(256)]public string Line(){var sb=new StringBuilder();for(var b=Char();b!=10&&!isEof;b=(char)Read())sb.Append(b);return sb.ToString();}[MethodImpl(256)]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(256)]public long Integer(){long ret=0;var ng=false;byte b;do b=Read();while(b!='-'&&(b<'0'||'9'<b));if(b=='-'){ng=true;b=Read();}for(;'0'<=b&&b<='9';b=Read())ret=ret*10+(b^'0');return ng?-ret:ret;}[MethodImpl(256)]public ulong UInteger(){ulong ret=0;byte b;do b=Read();while(b<'0'||'9'<b);for(;'0'<=b&&b<='9';b=Read())ret=ret*10+(ulong)(b^'0');return ret;}[MethodImpl(256)]public double Double()=>double.Parse(Scan());}}
namespace Lib{public static class OutputLib{[MethodImpl(256)]public static void WriteJoin<T>(string s,IEnumerable<T>t)=>Console.WriteLine(string.Join(s,t));[MethodImpl(256)]public static void WriteMat<T>(T[,]a,string sep=" "){int sz1=a.GetLength(0),sz2=a.GetLength(1);var b=new T[sz2];for(int i=0;i<sz1;i++){for(int j=0;j<sz2;j++)b[j]=a[i,j];WriteJoin(sep,b);}}[MethodImpl(256)]public static void WriteMat<T>(T[][]a,string sep=" "){foreach(var ar in a)WriteJoin(sep,ar);}[MethodImpl(256)]public static void WriteMat<T>(T[][]a,Func<T,string>map,string sep=" "){foreach(var ar in a)WriteJoin(sep,ar.Select(x=>map(x)));}[MethodImpl(256)]public static void Write(object t)=>Console.WriteLine(t.ToString());[MethodImpl(256)]public static void Write(params object[]arg)=>Console.WriteLine(string.Join(" ",arg.Select(x=>x.ToString())));[MethodImpl(256)]public static void Write(string str)=>Console.WriteLine(str);[MethodImpl(256)]public static void WriteFlush(object t){Console.WriteLine(t.ToString());Console.Out.Flush();}[MethodImpl(256)]public static void WriteError(object t)=>Console.Error.WriteLine(t.ToString());[MethodImpl(256)]public static void Flush()=>Console.Out.Flush();[MethodImpl(256)]public static void YN(bool t)=>Console.WriteLine(t?"YES":"NO");[MethodImpl(256)]public static void Yn(bool t)=>Console.WriteLine(t?"Yes":"No");[MethodImpl(256)]public static void yn(bool t)=>Console.WriteLine(t?"yes":"no");[MethodImpl(256)]public static void DeleteLine()=>Console.Write("\x1b[1A\x1b[2K");[MethodImpl(256)]public static void ProgressBar(long now,long total,int blocks=50){int x=(int)((2*now*blocks+1)/(2*total));Console.Write($"\x1b[G[\x1b[42m{string.Concat(Enumerable.Repeat("_",x))}\x1b[0m{string.Concat(Enumerable.Repeat("_",blocks-x))}] : {now} / {total}");}}}
namespace SourceExpander{public class Expander{[Conditional("EXP")]public static void Expand(string inputFilePath=null,string outputFilePath=null,bool ignoreAnyError=true){}public static string ExpandString(string inputFilePath=null,bool ignoreAnyError=true){return "";}}}
#endregion Expanded by https://github.com/kzrnm/SourceExpander