結果
| 問題 | No.1878 union-find の数え上げ |
| ユーザー |
 fgwiebfaoish
|
| 提出日時 | 2022-03-18 21:44:13 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 102 ms / 2,000 ms |
| コード長 | 9,139 bytes |
| コンパイル時間 | 2,293 ms |
| コンパイル使用メモリ | 121,944 KB |
| 実行使用メモリ | 42,060 KB |
| 最終ジャッジ日時 | 2024-10-03 09:26:18 |
| 合計ジャッジ時間 | 3,738 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 13 |
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 int mod=998244353;static Sc sc=new Sc();static void Main(){Pt pt=new Pt(Solve);pt.Sm();}static void Solve(Pt pt) {Sc sc=new Sc();var s=sc.Ia;int n=s[0],m=n;var li=new List<int>[n+1];var b=new bool[n+1];var h=new int[n+1];for(int i=1;i<=n;i++){li[i]=new List<int>();}for(int i=2;i<=m;i++){var e=sc.I;li[i].Add(e);li[e].Add(i);}Mint ans=1;Fu(1,0);for(int i = 2;i <= n;i++) {ans*=h[i];}pt.Wl(ans);void Fu(int a,int g){b[a]=true;h[a]=g;for(int i=0;i<li[a].Count;i++){if(!b[li[a][i]]){Fu(li[a][i], g+1);}}}}}public struct Mint{const int mod=998244353;private long d;public Mint(long d){this.d=d;}public static implicit operator Mint(long d){return new Mint(d%mod);}public static explicit operator long(Mint d){return d.d;}public override string ToString(){return d.ToString();}public static Mint operator+(Mint a,long b){a.d=(mod+a.d+b%mod)%mod;return a;}public static Mint operator+(Mint a,Mint b){a.d=(a.d+b.d)%mod;return a;}public static Mint operator-(Mint a,long b){a.d=(mod+a.d-b%mod)%mod;return a;}public static Mint operator-(Mint a,Mint b){a.d=(mod+a.d-b.d)%mod;return a;}public static Mint operator*(Mint a,long b){a.d=b%mod*a.d%mod;return a;}public static Mint operator*(Mint a,Mint b){a.d=a.d*b.d%mod;return a;}public static Mint operator/(Mint a,long b){a.d=a.d*Mi(b)%mod;return a;}public static Mint operator/(Mint a,Mint b){a.d=a.d*Mi(b.d)%mod;return a;}public static bool operator==(Mint a,long b){return (long)a==b;}public static bool operator!=(Mint a,long b){return (long)a!=b;}public override bool Equals(object obj){return false;}public override int GetHashCode(){return 0;}public static long Mi(long a){a=(a+mod)%mod;long b=mod,u=1,v=0;while(b>0){long t=a/b;a-=t*b;(a,b)=(b,a);u-=t*v;(u,v)=(v,u);}u%=mod;if(u<0){u+=mod;}return u%mod;}}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(string f,int s){sb.Append(s.ToString(f));}public void W(string f,long s){sb.Append(s.ToString(f));}public void W(string f,double s){sb.Append(s.ToString(f));}public void W(string f,decimal s){sb.Append(s.ToString(f));}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(string f,int s){sb.Append(s.ToString(f)).Append(Environment.NewLine);}public void Wl(string f,long s){sb.Append(s.ToString(f)).Append(Environment.NewLine);}public void Wl(string f,double s){sb.Append(s.ToString(f)).Append(Environment.NewLine);}public void Wl(string f,decimal s){sb.Append(s.ToString(f)).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(object[] s){sb.Append(string.Join(" ",s)).Append(Environment.NewLine);}public void Wl(){sb.Append(Environment.NewLine);}public void Sm(){Console.Write(sb);}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));}}