結果
| 問題 |
No.3189 Semifinal Stage
|
| ユーザー |
 KumaTachiRen
|
| 提出日時 | 2025-06-20 23:18:51 |
| 言語 | C# (.NET 8.0.404) |
| 結果 |
AC
|
| 実行時間 | 3,932 ms / 4,000 ms |
| コード長 | 17,274 bytes |
| コンパイル時間 | 8,242 ms |
| コンパイル使用メモリ | 168,836 KB |
| 実行使用メモリ | 268,600 KB |
| 最終ジャッジ日時 | 2025-08-29 00:25:26 |
| 合計ジャッジ時間 | 19,916 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge2 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 30 |
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 (106 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 Lib.GraphLib;
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.Functions;
using static Lib.OutputLib;
public class Solver
{
const bool MultiTestCase = false;
void Solve()
{
int n = ri;
var graph = new UnweightedGraph(n);
for (int i = 0; i < n - 1; i++) graph.AddEdge(ri - 1, ri - 1);
var g = graph.ToArray();
int q = ri;
var qs = new (int t, int x)[q];
for (int i = 0; i < q; i++) qs[i] = (ri, ri - 1);
var st = new SimpleIntStack(n);
var lca = new LowestCommonAncestor(graph, 0);
var dist = new int[n];
dist.AsSpan().Fill(n);
{
dist[0] = 0;
st.Push(0);
while (st.Count > 0)
{
int x = st.Pop();
foreach (var y in g[x])
if (dist[y] > dist[x] + 1)
{
dist[y] = dist[x] + 1;
st.Push(y);
}
}
}
var f = new bool[n];
const int B = 1000;
var vs = new int[B];
var ng = new bool[n];
var d = new int[n];
for (int k = 0; k * B < q; k++)
{
int l = k * B, r = Math.Min(l + B, q);
int c2 = 0;
for (int i = l; i < r; i++) if (qs[i].t == 1) vs[c2++] = qs[i].x;
for (int i = 0; i < c2; i++) ng[vs[i]] = true;
for (int i = 0; i < n; i++)
{
if (f[i] && !ng[i])
{
d[i] = 0;
st.Push(i);
}
else d[i] = n;
}
while (st.Count > 0)
{
int x = st.Pop();
foreach (var y in g[x])
if (d[y] > d[x] + 1)
{
d[y] = d[x] + 1;
st.Push(y);
}
}
for (int i = l; i < r; i++)
{
var (t, x) = qs[i];
if (t == 1)
{
f[x] = !f[x];
}
else
{
int v = d[x];
for (int j = 0; j < c2; j++)
{
int y = vs[j];
if (f[y]) Chmin(ref v, dist[x] + dist[y] - 2 * dist[lca.LCA(x, y)]);
}
Write(v);
}
}
for (int i = 0; i < c2; i++) ng[vs[i]] = false;
}
}
#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
public class SimpleIntStack{int[]data;int index;public SimpleIntStack(int size_max){data=new int[size_max];index=0;}public int Count{get=>index;}public void Push(int value)=>data[index++]=value;public int Peek()=>data[index-1];public int Pop()=>data[ --index];public void Clear()=>index=0;}public class SimpleIntPairStack{(int,int)[]data;int index;public SimpleIntPairStack(int size_max){data=new(int,int)[size_max];index=0;}public int Count{get=>index;}public void Push((int,int)value)=>data[index++]=value;public void Push(int item1,int item2)=>data[index++]=(item1,item2);public(int,int)Peek()=>data[index-1];public(int,int)Pop()=>data[ --index];public void Clear()=>index=0;}
public class SparseTable<T>{public int Length{get;}readonly T[][]st;Func<T,T,T>op;public SparseTable(ReadOnlySpan<T>arr,Func<T,T,T>_op){Length=arr.Length;op=_op;int log=1;while((Length>>log)>0)log++;st=new T[log][];st[0]=arr.ToArray();for(int k=1;k<st.Length;k++){var stp=st[k-1];var sti=st[k]=new T[Length-(1<<k)+1];for(int i=0;i<sti.Length;i++)sti[i]=op(stp[i],stp[i+(1<<(k-1))]);}}public T this[Range r]{[MethodImpl(256)]get{int j=0;while((1<<j)<=r.End.Value-r.Start.Value)j++;j--;return op(st[j][r.Start.Value],st[j][r.End.Value-(1<<j)]);}}public T Prod(int l,int r){int j=0;while((1<<j)<=r-l)j++;j--;return op(st[j][l],st[j][r-(1<<j)]);}}
namespace Lib{public static class Functions{[MethodImpl(256)]public static int Popcount(ulong x){x=(x&0x5555555555555555UL)+((x>>1)&0x5555555555555555UL);x=(x&0x3333333333333333UL)+((x>>2)&0x3333333333333333UL);x=(x&0x0f0f0f0f0f0f0f0fUL)+((x>>4)&0x0f0f0f0f0f0f0f0fUL);x=(x&0x00ff00ff00ff00ffUL)+((x>>8)&0x00ff00ff00ff00ffUL);x=(x&0x0000ffff0000ffffUL)+((x>>16)&0x0000ffff0000ffffUL);x=(x&0x00000000ffffffffUL)+((x>>32)&0x00000000ffffffffUL);return(int)x;}[MethodImpl(256)]public static int Popcount(long x){x=(x&0x5555555555555555L)+((x>>1)&0x5555555555555555L);x=(x&0x3333333333333333L)+((x>>2)&0x3333333333333333L);x=(x&0x0f0f0f0f0f0f0f0fL)+((x>>4)&0x0f0f0f0f0f0f0f0fL);x=(x&0x00ff00ff00ff00ffL)+((x>>8)&0x00ff00ff00ff00ffL);x=(x&0x0000ffff0000ffffL)+((x>>16)&0x0000ffff0000ffffL);x=(x&0x00000000ffffffffL)+((x>>32)&0x00000000ffffffffL);return(int)x;}[MethodImpl(256)]public static int Popcount(int x){x=(x&0x55555555)+((x>>1)&0x55555555);x=(x&0x33333333)+((x>>2)&0x33333333);x=(x&0x0f0f0f0f)+((x>>4)&0x0f0f0f0f);x=(x&0x00ff00ff)+((x>>8)&0x00ff00ff);x=(x&0x0000ffff)+((x>>16)&0x0000ffff);return x;}[MethodImpl(256)]public static int Ctz(long x){if(x==0)return-1;return Popcount((ulong)((x&-x)-1));}[MethodImpl(256)]public static int CeilPow2(int n){int x=0;while((1<<x)<n)x++;return x;}[MethodImpl(256)]public static int SafeMod(int x,int m){int r=x%m;return r<0?r+Math.Abs(m):r;}[MethodImpl(256)]public static long SafeMod(long x,long m){long r=x%m;return r<0?r+Math.Abs(m):r;}[MethodImpl(256)]public static bool IsIncreasing(long a,long b,long c)=>a<=b&&b<=c;[MethodImpl(256)]public static int Sign(long x)=>x==0?0:(x<0?-1:1);[MethodImpl(256)]public static int Sign(double x)=>x==0?0:(x<0?-1:1);[MethodImpl(256)]public static int DigitSum(long n,int d=10){long s=0;while(n>0){s+=n%d;n/=d;}return(int)s;}[MethodImpl(256)]public static long Floor(long a,long b)=>a>=0?a/b:(a+1)/b-1;[MethodImpl(256)]public static long Ceil(long a,long b)=>a>0?(a-1)/b+1:a/b;[MethodImpl(256)]public static long Gcd(long a,long b){if(a==0)return Math.Abs(b);if(b==0)return Math.Abs(a);if(a<0)a=-a;if(b<0)b=-b;int u=Ctz(a);int v=Ctz(b);a>>=u;b>>=v;while(a!=b){if(a<b)(a,b)=(b,a);a-=b;a>>=Ctz(a);}return a<<Math.Min(u,v);}[MethodImpl(256)]public static(long x,long y,long g)ExtGcd(long a,long b){if(b==0)return(Sign(a),0,Math.Abs(a));long c=SafeMod(a,b);var(x2,y2,g)=ExtGcd(b,c);long x=SafeMod(y2,b);long y=(g-a*x)/b;return(x,y,g);}[MethodImpl(256)]public static void Swap(ref int x,ref int y){x^=y;y^=x;x^=y;}[MethodImpl(256)]public static void Swap(ref long x,ref long y){x^=y;y^=x;x^=y;}[MethodImpl(256)]public static void Swap<T>(ref T x,ref T y){T t=y;y=x;x=t;}[MethodImpl(256)]public static T Clamp<T>(T x,T l,T r)where T:IComparable<T> =>x.CompareTo(l)<=0?l:(x.CompareTo(r)<=0?x:r);[MethodImpl(256)]public static T Clamp<T>(ref T x,T l,T r)where T:IComparable<T> =>x=x.CompareTo(l)<=0?l:(x.CompareTo(r)<=0?x:r);[MethodImpl(256)]public static void Chmin<T>(ref T x,T y)where T:IComparable<T>{if(x.CompareTo(y)>0)x=y;}[MethodImpl(256)]public static void Chmax<T>(ref T x,T y)where T:IComparable<T>{if(x.CompareTo(y)<0)x=y;}[MethodImpl(256)]public static int LowerBound(long[]arr,long val,int l=-1,int r=-1)=>LowerBound(arr.AsSpan(),t=>Sign(t-val),l,r);[MethodImpl(256)]public static int LowerBound(int[]arr,int val,int l=-1,int r=-1)=>LowerBound(arr.AsSpan(),t=>t-val,l,r);[MethodImpl(256)]public static int LowerBound<T>(T[]arr,T val,int l=-1,int r=-1)where T:IComparable<T> =>LowerBound(arr.AsSpan(),t=>t.CompareTo(val),l,r);[MethodImpl(256)]public static int LowerBound<T>(T[]arr,Func<T,int>comp,int l=-1,int r=-1)=>LowerBound(arr.AsSpan(),comp,l,r);[MethodImpl(256)]public static int LowerBound<T>(Span<T>data,Func<T,int>comp,int l=-1,int r=-1){if(data.Length==0)return-1;if(l==-1)l=0;if(r==-1)r=data.Length;while(l<r){int x=(l+r)/2;if(comp(data[x])<0)l=x+1;else r=x;}return l;}[MethodImpl(256)]public static int RangeCount<T>(T[]arr,T geq,T lt,int l=-1,int r=-1)where T:IComparable<T> =>Math.Max(0,LowerBound(arr.AsSpan(),t=>t.CompareTo(lt),l,r)-LowerBound(arr.AsSpan(),t=>t.CompareTo(geq),l,r));[MethodImpl(256)]public static string ToBase2(long v,int digit=-1){if(digit==-1){digit=0;while((v>>digit)>0)digit++;}var c=new string[digit];for(int i=0;i<digit;i++)c[digit-1-i]=((v>>i)&1)==0?"0":"1";return string.Join("",c);}[MethodImpl(256)]public static string ToBaseN(long v,int n,int digit=-1){if(digit==-1){digit=0;long pow=1;while(v>=pow){digit++;pow*=n;}}var c=new int[digit];for(int i=0;i<digit;i++,v/=n)c[digit-1-i]=(int)(v%n);return string.Join("",c);}}}
namespace Lib{public class Graph<T>{public struct Edge{public int from,to;public T data;public Edge(int _from,int _to,T _data){from=_from;to=_to;data=_data;}public Edge(int _to,T _data){from=-1;to=_to;data=_data;}}int n;public int Size=>n;public List<Edge>[]edges;public Graph(Graph<T>_g){n=_g.Size;edges=new List<Edge>[n];for(int i=0;i<n;i++)edges[i]=new List<Edge>(_g.edges[i]);}public Graph(List<int>[]_g,Func<T>_e){n=_g.Length;edges=new List<Edge>[n];for(int i=0;i<n;i++)edges[i]=new List<Edge>();for(int i=0;i<n;i++)foreach(var j in _g[i])edges[i].Add(new Edge(i,j,_e()));}public Graph(int[][]_g,Func<T>_e){n=_g.Length;edges=new List<Edge>[n];for(int i=0;i<n;i++)edges[i]=new List<Edge>();for(int i=0;i<n;i++)foreach(var j in _g[i])edges[i].Add(new Edge(i,j,_e()));}public Graph(int _n){n=_n;edges=new List<Edge>[n];for(int i=0;i<n;i++)edges[i]=new List<Edge>();}public void AddEdge(int x,int y,T data){edges[x].Add(new Edge(x,y,data));edges[y].Add(new Edge(y,x,data));}public void AddDirectedEdge(int src,int to,T data){edges[src].Add(new Edge(src,to,data));}public Edge[][]ToArray(bool sort=true){if(sort)for(int i=0;i<n;i++)edges[i].Sort((e,f)=>e.to.CompareTo(f.to));var g=new Edge[n][];for(int i=0;i<n;i++)g[i]=edges[i].ToArray();return g;}public int[][]ToUnweightedArray(bool sort=true){if(sort)for(int i=0;i<n;i++)edges[i].Sort((e,f)=>e.to.CompareTo(f.to));var g=new int[n][];for(int i=0;i<n;i++)g[i]=edges[i].Select(e=>e.to).ToArray();return g;}public(Edge[]csr,int[]start)ToCSR(bool sort=true){if(sort)for(int i=0;i<n;i++)edges[i].Sort((e,f)=>e.to.CompareTo(f.to));var start=new int[n+1];for(int i=0;i<n;i++)start[i+1]=start[i]+edges[i].Count;var csr=new Edge[start[n]];for(int i=0;i<n;i++)for(int j=0;j<edges[i].Count;j++)csr[j+start[i]]=edges[i][j];return(csr,start);}public(int[]csr,int[]csr_start)ToUnweightedCSR(bool sort=true){if(sort)for(int i=0;i<n;i++)edges[i].Sort((e,f)=>e.to.CompareTo(f.to));var start=new int[n+1];for(int i=0;i<n;i++)start[i+1]=start[i]+edges[i].Count;var csr=new int[start[n]];for(int i=0;i<n;i++)for(int j=0;j<edges[i].Count;j++)csr[j+start[i]]=edges[i][j].to;return(csr,start);}}}
namespace Lib.GraphLib{public class LowestCommonAncestor{public int Size{get;private set;}public readonly int Root;readonly UnweightedGraph graph;int[][]g;SparseTable<(int x,int d)>sparse_table;internal int[]in_time,depth,parent,euler_tour;private int time;public LowestCommonAncestor(int size,int root=0){Size=size;Root=root;graph=new UnweightedGraph(size);}public LowestCommonAncestor(in UnweightedGraph graph,int root=0){Size=graph.Size;Root=root;this.graph=graph;Build();}public void AddEdge(int u,int v)=>graph.AddEdge(u,v);public void Build(){g=graph.ToArray();parent=new int[Size];Array.Fill(parent,-1);depth=new int[Size];in_time=new int[Size];euler_tour=new int[2*Size-1];time=0;DFS(Root);var pair=new(int x,int d)[euler_tour.Length];for(int i=0;i<euler_tour.Length;i++)pair[i]=(euler_tour[i],depth[euler_tour[i]]);sparse_table=new SparseTable<(int x,int d)>(pair,(x,y)=>x.d<=y.d?x:y);}private void DFS(int x){in_time[x]=time;euler_tour[time++]=x;foreach(var y in g[x]){if(y==parent[x])continue;parent[y]=x;depth[y]=depth[x]+1;DFS(y);euler_tour[time++]=x;}}public int LCA(int u,int v){int x=in_time[u],y=in_time[v];if(x>y)(x,y)=(y,x);return sparse_table[x..(y+1)].x;}}}
namespace Lib{public class UnweightedGraph:Graph<int>{public UnweightedGraph(UnweightedGraph _g):base(_g){}public UnweightedGraph(List<int>[]_g):base(_g,()=>1){}public UnweightedGraph(int _n):base(_n){}[MethodImpl(256)]public void AddEdge(int x,int y)=>AddEdge(x,y,1);[MethodImpl(256)]public void AddDirectedEdge(int src,int to)=>AddDirectedEdge(src,to,1);public new int[][]ToArray(bool sort=true)=>ToUnweightedArray(sort);public new(int[]csr,int[]csr_start)ToCSR(bool sort=true)=>ToUnweightedCSR(sort);}}
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