結果
| 問題 |
No.8092 3-2-SAT
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-04-01 22:58:12 |
| 言語 | C# (.NET 8.0.404) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 5,294 bytes |
| コンパイル時間 | 10,191 ms |
| コンパイル使用メモリ | 166,556 KB |
| 実行使用メモリ | 195,352 KB |
| 最終ジャッジ日時 | 2024-11-20 11:30:12 |
| 合計ジャッジ時間 | 19,480 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 * 1 |
| other | AC * 10 RE * 10 |
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 (97 ms)。 MSBuild のバージョン 17.9.6+a4ecab324 (.NET) 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 System;
using System.Linq;
using System.Numerics;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using N = System.Int64;
static class Program
{
static public void Main(string[] args)
{
Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false });
var solver = new Solver();
solver.Solve();
Console.Out.Flush();
}
}
public class Solver
{
public void Solve()
{
int n = ri, m = ri;
var s = new TwoSAT(3 * n);
for (int i = 0; i < n; i++)
{
s.AddClosure(i + 3 * n, i + 4 * n);
s.AddClosure(i + 3 * n, i + 5 * n);
s.AddClosure(i + 4 * n, i + 5 * n);
}
for (int i = 0; i < m; i++)
{
int p = ri - 1, q = ri - 1, a = ri - 1, b = ri - 1;
s.AddClosure(p + a * n, q + b * n);
}
if (s.Satisfy())
{
var x = new int[n];
for (int i = 0; i < n; i++)
{
for (int j = 0; j < 3; j++) if (s.ans[i + j * n]) x[i] = j + 1;
}
WriteJoin(" ", x);
}
else Write(-1);
}
public class TwoSAT
{
int n;
List<int>[] e, re;
int[] cmp;
List<int> ps;
public bool[] ans;
public TwoSAT(int _n)
{
n = _n;
e = new List<int>[n * 2];
re = new List<int>[n * 2];
for (int i = 0; i < n * 2; i++)
{
e[i] = new List<int>();
re[i] = new List<int>();
}
ans = new bool[n * 2];
}
public void AddClosure(int x, int y)
{
AddEdge((x + n) % (2 * n), y);
AddEdge((y + n) % (2 * n), x);
}
private void AddEdge(int x, int y)
{
e[x].Add(y);
re[y].Add(x);
}
private void Dfs(int u)
{
cmp[u] = 0;
for (int i = 0; i < e[u].Count; i++)
{
int v = e[u][i];
if (cmp[v] == -1) Dfs(v);
}
ps.Add(u);
}
void rDfs(int u, int k)
{
cmp[u] = k;
for (int i = 0; i < re[u].Count; i++)
{
int v = re[u][i];
if (cmp[v] == -1) rDfs(v, k);
}
}
private int Scc()
{
cmp = new int[n * 2];
for (int i = 0; i < 2 * n; i++) cmp[i] = -1;
ps = new List<int>();
for (int i = 0; i < 2 * n; i++) if (cmp[i] == -1) Dfs(i);
for (int i = 0; i < 2 * n; i++) cmp[i] = -1;
int k = 0;
for (int i = 2 * n - 1; i >= 0; i--) if (cmp[ps[i]] == -1) rDfs(ps[i], k++);
return k;
}
public bool Satisfy()
{
Scc();
for (int i = 0; i < n; i++)
{
if (cmp[i] == cmp[i + n]) return false;
ans[i] = cmp[i] > cmp[i + n];
}
return true;
}
}
const long inf = (long)1 << 60;
int ri { get { return (int)sc.Integer(); } }
long rl { get { return sc.Integer(); } }
double rd { get { return sc.Double(); } }
string rs { get { return sc.Scan(); } }
public StreamScanner sc = new StreamScanner(Console.OpenStandardInput());
void WriteJoin<T>(string s, T[] t) { Console.WriteLine(string.Join(s, t)); }
void WriteJoin<T>(string s, List<T> t) { Console.WriteLine(string.Join(s, t)); }
void Write<T>(T t) { Console.WriteLine(t.ToString()); }
void YN(bool t) { Console.WriteLine(t ? "YES" : "NO"); }
void Yn(bool t) { Console.WriteLine(t ? "Yes" : "No"); }
void yn(bool t) { Console.WriteLine(t ? "yes" : "no"); }
void Swap(ref int x, ref int y) { x ^= y; y ^= x; x ^= y; }
}
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) throw new EndOfStreamException();
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 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 Integer()
{
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 double Double() { return double.Parse(Scan()); }
}