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 = 500; 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(out T[] a, int n, Func read) { a = new T[n]; for (int i = 0; i < a.Length; i++) a[i] = read(); } void ReadArray(out T[] a, int n, Func 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{public int Length{get;}readonly T[][]st;Funcop;public SparseTable(ReadOnlySpanarr,Func_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>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<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>=Ctz(a);}return a<(ref T x,ref T y){T t=y;y=x;x=t;}[MethodImpl(256)]public static T Clamp(T x,T l,T r)where T:IComparable =>x.CompareTo(l)<=0?l:(x.CompareTo(r)<=0?x:r);[MethodImpl(256)]public static T Clamp(ref T x,T l,T r)where T:IComparable =>x=x.CompareTo(l)<=0?l:(x.CompareTo(r)<=0?x:r);[MethodImpl(256)]public static void Chmin(ref T x,T y)where T:IComparable{if(x.CompareTo(y)>0)x=y;}[MethodImpl(256)]public static void Chmax(ref T x,T y)where T:IComparable{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[]arr,T val,int l=-1,int r=-1)where T:IComparable =>LowerBound(arr.AsSpan(),t=>t.CompareTo(val),l,r);[MethodImpl(256)]public static int LowerBound(T[]arr,Funccomp,int l=-1,int r=-1)=>LowerBound(arr.AsSpan(),comp,l,r);[MethodImpl(256)]public static int LowerBound(Spandata,Funccomp,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(T[]arr,T geq,T lt,int l=-1,int r=-1)where T:IComparable =>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>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{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[]edges;public Graph(Graph_g){n=_g.Size;edges=new List[n];for(int i=0;i(_g.edges[i]);}public Graph(List[]_g,Func_e){n=_g.Length;edges=new List[n];for(int i=0;i();for(int i=0;i_e){n=_g.Length;edges=new List[n];for(int i=0;i();for(int i=0;i[n];for(int i=0;i();}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;ie.to.CompareTo(f.to));var g=new Edge[n][];for(int i=0;ie.to.CompareTo(f.to));var g=new int[n][];for(int i=0;ie.to).ToArray();return g;}public(Edge[]csr,int[]start)ToCSR(bool sort=true){if(sort)for(int i=0;ie.to.CompareTo(f.to));var start=new int[n+1];for(int i=0;ie.to.CompareTo(f.to));var start=new int[n+1];for(int i=0;isparse_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(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{public UnweightedGraph(UnweightedGraph _g):base(_g){}public UnweightedGraph(List[]_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=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'double.Parse(Scan());}} namespace Lib{public static class OutputLib{[MethodImpl(256)]public static void WriteJoin(string s,IEnumerablet)=>Console.WriteLine(string.Join(s,t));[MethodImpl(256)]public static void WriteMat(T[,]a,string sep=" "){int sz1=a.GetLength(0),sz2=a.GetLength(1);var b=new T[sz2];for(int i=0;i(T[][]a,string sep=" "){foreach(var ar in a)WriteJoin(sep,ar);}[MethodImpl(256)]public static void WriteMat(T[][]a,Funcmap,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