結果
| 問題 | No.2337 Equidistant |
| ユーザー |
 fgwiebfaoish
|
| 提出日時 | 2023-06-03 13:03:49 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 9,673 bytes |
| コンパイル時間 | 3,444 ms |
| コンパイル使用メモリ | 111,232 KB |
| 実行使用メモリ | 74,588 KB |
| 最終ジャッジ日時 | 2024-12-29 02:46:50 |
| 合計ジャッジ時間 | 25,502 ms |
|
ジャッジサーバーID （参考情報） |
judge1 / judge3 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 1 WA * 27 |
コンパイルメッセージ
Microsoft (R) Visual C# Compiler version 3.9.0-6.21124.20 (db94f4cc) Copyright (C) Microsoft Corporation. All rights reserved.
ソースコード
using System;using System.Collections.Generic;using System.Collections;using System.Collections.Specialized;using System.Linq;using System.Text;using System.IO;using System.Reflection;using static System.Math;using System.Numerics;using System.Threading;using System.Runtime.CompilerServices;using System.Diagnostics;static class Program {const long inf = long.MaxValue>>1;const int mod = 998244353;static Sc sc = new Sc();static void Main() {Pt pt = new Pt(Solve);pt.Sm();}static void Solve(Pt pt) {var (n,q)=sc.Tp2<int>();var m = n-1;var li = new List<int>[n+1];for(int i = 1;i<=n;i++) { li[i]=new List<int>(); }for(int i = 0;i<m;i++) {var e = sc.Ia;li[e[0]].Add(e[1]);li[e[1]].Add(e[0]);}var da = new Dlca(li,true);for(int i = 0;i<q;i++) {var e = sc.Ia;var di = da.Di(e[0],e[1]);if((di&1)==0) {var c = 0;int ans = 0;if(da.de[e[0]]==da.de[e[1]]) {ans=n-da.cd[da.Rt(e[0],(di>>1)-1)]-da.cd[da.Rt(e[1],(di>>1)-1)];}else if(da.de[e[0]]>da.de[e[1]]) {c=da.Rt(e[0],di>>1);ans=da.de[c]-da.cd[da.Rt(e[0],(di>>1)-1)];}else {c=da.Rt(e[1],di>>1);ans=da.de[c]-da.cd[da.Rt(e[1],(di>>1)-1)];}pt.Wl(ans);}else {pt.Wl(0);}}}}public class Dlca {private bool[] b;private int[][] h;public readonly int[] de;private int o;private List<int>[] li;public readonly List<int> pe;public readonly int[] pa;public readonly int[] cd;public Dlca(List<int>[] li,int pe) {this.li=li;int n = li.Length;o=(int)Log(n-1,2)+1;de=new int[n];de[0]=-1;h=new int[o][];b=new bool[n];h[0]=new int[n];pa=new int[n];cd=new int[n];this.pe=new List<int>();if(pe!=-1) {Fd1(pe,0,pe);this.pe.Add(pe);}else {for(int i = 1;i<n;i++) {if(!b[i]) {Fd1(i,0,i);this.pe.Add(i);}}}for(int i = 1;i<o;i++) {h[i]=new int[n];for(int j = 1;j<n;j++) { h[i][j]=h[i-1][h[i-1][j]]; }}}public Dlca(List<int>[] li,bool bo) : this(li,bo ? 1 : -1) { }private void Fd1(int a,int f,int p) {b[a]=true;de[a]=f;pa[a]=p;cd[a]=1;for(int i = 0;i<li[a].Count;i++) {int j = (int)(object)li[a][i];if(!b[j]) {h[0][j]=a;Fd1(j,f+1,p);cd[a]+=cd[j];}}}public int Lca(int a,int b) {if(de[a]>de[b]) { int c = a; a=b; b=c; }for(int i = o-1;de[a]!=de[b];i--) { if(de[h[i][b]]>=de[a]) { b=h[i][b]; } }if(a==b) { return a; }for(int i = o-1;i>=0;i--) { if(h[i][a]!=h[i][b]) { a=h[i][a]; b=h[i][b]; } }return h[0][a];}public int Di(int a,int b) {int l = Lca(a,b);return l!=0 ? de[a]+de[b]-(de[l]<<1) : int.MinValue;}public int Rt(int a,int b) {if((b&~((1<<h.Length)-1))!=0) return 0;for(int i = 0;i<h.Length;i++) {if((b&(1<<i))!=0) { a=h[i][a]; }}return a;}}public class Pt {private StringBuilder sb = new StringBuilder();public Pt(Action<Pt> f) { f(this); }public void W(int s) { sb.Append(s); }public void W(long s) { sb.Append(s); }public void W(double s) { sb.Append(s); }public void W(decimal s) { sb.Append(s); }public void W(char s) { sb.Append(s); }public void W(string s) { sb.Append(s); }public void W(object s) { sb.Append(s); }public void W(params object[] s) { sb.Append(string.Join(" ",s)); }public void Wl(int s) { sb.Append(s).Append(Environment.NewLine); }public void Wl(long s) { sb.Append(s).Append(Environment.NewLine); }public void Wl(double s) { sb.Append(s).Append(Environment.NewLine); }public void Wl(decimal s) { sb.Append(s).Append(Environment.NewLine); }public void Wl(char s) { sb.Append(s).Append(Environment.NewLine); }public void Wl(string s) { sb.Append(s).Append(Environment.NewLine); }public void Wl(object s) { sb.Append(s).Append(Environment.NewLine); }public void Wl(int[] s) { sb.Append(string.Join(" ",s)).Append(Environment.NewLine); }public void Wl(long[] s) { sb.Append(string.Join(" ",s)).Append(Environment.NewLine); }public void Wl(double[] s) { sb.Append(string.Join(" ",s)).Append(Environment.NewLine); }public void Wl(string[] s) { sb.Append(string.Join(" ",s)).Append(Environment.NewLine); }public void Wl(params object[] s) { sb.Append(string.Join(" ",s)).Append(Environment.NewLine); }public void Wl() { sb.Append(Environment.NewLine); }public void Sm() { Console.Write(sb); }public void Op(StreamWriter sw) {sw.Write(sb);sw.Close();}public static bool operator ==(Pt a,Pt b) { return a.sb.ToString()==b.sb.ToString(); }public static bool operator !=(Pt a,Pt b) { return a.sb.ToString()!=b.sb.ToString(); }public override bool Equals(object obj) { return false; }public override int GetHashCode() { return 0; }}public class Sc {[MethodImpl(MethodImplOptions.AggressiveInlining)]protected virtual string Rl() { return Console.ReadLine(); }[MethodImpl(MethodImplOptions.AggressiveInlining)]protected virtual string[] Sp(string st) { return st.Split(); }[MethodImpl(MethodImplOptions.AggressiveInlining)]private T Ct<T>(string s) { return (T)Convert.ChangeType(s,typeof(T)); }public virtual int I { get { return int.Parse(Rl()); } }public virtual long L { get { return long.Parse(Rl()); } }public virtual double D { get { return double.Parse(Rl()); } }public virtual string S { get { return Rl(); } }public int[] Ia { get { return Array.ConvertAll(Sp(Rl()),int.Parse); } }public long[] La { get { return Array.ConvertAll(Sp(Rl()),long.Parse); } }public double[] Da { get { return Array.ConvertAll(Sp(Rl()),double.Parse); } }public string[] Sa { get { return Sp(Rl()); } }public object[] Oa { get { return Sp(Rl()); } }public int[] Ia2 { get { return Array.ConvertAll(Sp("0 "+Rl()+" 0"),int.Parse); } }public int[] Ia3(string a,string b) { return Array.ConvertAll(Sp(a+Rl()+b),int.Parse); }public int[] Ia3(int a) { return Array.ConvertAll(Sp(Rl()+" "+a.ToString()),int.Parse); }public long[] La2 { get { return Array.ConvertAll(Sp("0 "+Rl()+" 0"),long.Parse); } }public long[] La3(string a,string b) { return Array.ConvertAll(Sp(a+Rl()+b),long.Parse); }public long[] La3(int a) { return Array.ConvertAll(Sp(Rl()+" "+a.ToString()),long.Parse); }public double[] Da2 { get { return Array.ConvertAll(Sp("0 "+Rl()+" 0"),double.Parse); } }public double[] Da3(string a,string b) { return Array.ConvertAll(Sp(a+Rl()+b),double.Parse); }public T[] Arr<T>(int n,Func<T> f) { var a = new T[n]; for(int i = 0;i<n;i++) { a[i]=f(); } return a; }public T[] Arr<T>(int n,Func<int,T> f) { var a = new T[n]; for(int i = 0;i<n;i++) { a[i]=f(i); } return a; }public T[] Arr<T>(int n,Func<string[],T> f) { var a = new T[n]; for(int i = 0;i<n;i++) { a[i]=f(Sp(Rl())); } return a; }public T[] Arr<T>(int n,Func<int,string[],T> f) { var a = new T[n]; for(int i = 0;i<n;i++) { a[i]=f(i,Sp(Rl())); } return a; }[MethodImpl(MethodImplOptions.AggressiveInlining)]public (T, T) Tp2<T>() { var s = Sp(Rl()); return (Ct<T>(s[0]), Ct<T>(s[1])); }[MethodImpl(MethodImplOptions.AggressiveInlining)]public (T, T, T) Tp3<T>() { var s = Sp(Rl()); return (Ct<T>(s[0]), Ct<T>(s[1]), Ct<T>(s[2])); }[MethodImpl(MethodImplOptions.AggressiveInlining)]public (T, T, T, T) Tp4<T>() { var s = Sp(Rl()); return (Ct<T>(s[0]), Ct<T>(s[1]), Ct<T>(s[2]), Ct<T>(s[3])); }[MethodImpl(MethodImplOptions.AggressiveInlining)]public (T, T, T, T, T) Tp5<T>() { var s = Sp(Rl()); return (Ct<T>(s[0]), Ct<T>(s[1]), Ct<T>(s[2]), Ct<T>(s[3]), Ct<T>(s[4])); }[MethodImpl(MethodImplOptions.AggressiveInlining)]public (T, T, T, T, T, T) Tp6<T>() { var s = Sp(Rl()); return (Ct<T>(s[0]), Ct<T>(s[1]), Ct<T>(s[2]), Ct<T>(s[3]), Ct<T>(s[4]), Ct<T>(s[5])); }[MethodImpl(MethodImplOptions.AggressiveInlining)]public (T1, T2) Tp2<T1, T2>() { var s = Sp(Rl()); return (Ct<T1>(s[0]), Ct<T2>(s[1])); }[MethodImpl(MethodImplOptions.AggressiveInlining)]public (T1, T1, T2) Tp3<T1, T2>() { var s = Sp(Rl()); return (Ct<T1>(s[0]), Ct<T1>(s[1]), Ct<T2>(s[2])); }}public class Scr:Sc {private List<string> li = new List<string>();private int l = 0;private bool bo = false;[MethodImpl(MethodImplOptions.AggressiveInlining)]protected override string Rl() {if(bo) { return li[l++%li.Count]; }li.Add(Console.ReadLine());return li[li.Count-1];}public void Again() { bo=true; }}public class Sc2:Sc {private string[] sps = new string[] { " "," ","\t" };[MethodImpl(MethodImplOptions.AggressiveInlining)]protected override string[] Sp(string st) { return st.Split(sps,StringSplitOptions.RemoveEmptyEntries); }public override int I { get { return int.Parse(Sp(Rl())[0]); } }public override long L { get { return long.Parse(Sp(Rl())[0]); } }public override double D { get { return double.Parse(Sp(Rl())[0]); } }public override string S { get { return Sp(Rl())[0]; } }}public class Sct:Sc {private List<string> li = new List<string>();private int l = 0;public void Add(int s) { li.Add(s.ToString()); }public void Add(long s) { li.Add(s.ToString()); }public void Add(double s) { li.Add(s.ToString()); }public void Add(string s) { li.Add(s.ToString()); }public void Add(object s) { li.Add(s.ToString()); }public void Add(int[] s) { li.Add(string.Join(" ",s)); }public void Add(long[] s) { li.Add(string.Join(" ",s)); }public void Add(double[] s) { li.Add(string.Join(" ",s)); }public void Add(string[] s) { li.Add(string.Join(" ",s)); }public void Add(object[] s) { li.Add(string.Join(" ",s)); }protected override string Rl() { return li[l++]; }public void Clear() { li.Clear(); l=0; }public void Again() { l=0; }public void Pf() { Console.WriteLine(string.Join("\n",li)); }}