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1 2
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 100 22 4
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100 27
100 4
100 60
24 63
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27 89
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63 77
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100 65
24 14
27 15
60 10
71 16
100 67
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10 83
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 100 10 30
58 81
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97 45
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2 37 82
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 100 16 46
36 42
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42 54
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50 58
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50 81
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42 62
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74 75
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50 95
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2 56 77
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2 41 94
2 18 58
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2 100 57
2 88 79
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2 99 17
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2 79 9
2 59 79
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1 7

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import java.io.*;
import java.util.*;
/*
 * 	Heart beats fast
 * 		Colors and promises
 * 			How to be brave
 * 				How can I love when I am afraid to fall...
 */
public class Main 
{
	static node[] graph;
	static int[]val,pare;
	static boolean[]set,forset;
	static int n,m;
	public static void main(String[] args) throws IOException
	{
		n=ni();
		m=ni();
		int q=ni();
		graph=graph(n);
		for(int i=0; i<m; i++)
		{
			int te=ni()-1,te1=ni()-1;
			graph[te].adj.add(te1);
			graph[te1].adj.add(te);
		}
		set=new boolean[n];
		pare=new int[n];
		val=new int[n];
		for(int i=0; i<n; i++)
		{
			if(!set[i])
			{
				dfs(i,i);
			}
		}
		forset=new boolean[n];
		for(int i=0; i<n; i++)
			if(graph[i].adj.size()==1&&!forset[pare[i]])
				val[pare[i]]=dfser(i);
		for(int i=0; i<q; i++)
		{
			if(ni()==1)
			{
				int te=ni()-1;
				int te3,te2=te;
				while(te!=pare[te])
				{
					te=pare[te];
				}
				while(te2!=te)
				{
					te3=pare[te2];
					pare[te2]=te;
					te2=pare[te3];
				}
				pr(val[te]);
			}
			else
			{
				int te=ni()-1,te1=ni()-1;
				while(te!=pare[te])
					te=pare[te];
				while(te1!=pare[te1])
					te1=pare[te1];
				if(te!=te1)
					val[te]=Math.max(Math.max(val[te], val[te1]), (val[te]+1)/2+(val[te1]+1)/2+1);
				pare[te1]=te;
			}
		}
		System.out.println(ans);
	}
	static int min;
	static int dfser(int a)
	{
		forset[a]=true;
		Iterator<Integer> itr=graph[a].adj.iterator();
		int te=0;
		while(itr.hasNext())
		{
			int te1=itr.next();
			if(!forset[te1])
				te=Math.max(te, dfser(te1))+1;
		}
		return te;
	}
	static void dfs(int a,int b)
	{
		set[a]=true;
		pare[a]=b;
		Iterator<Integer> it=graph[a].adj.iterator();
		while(it.hasNext())
		{
			int te=it.next();
			if(!set[te])
				dfs(te, b);
		}
	}
	static final int mod=1000000007;
	static long modu=mod;
	static final double eps=1e-8;
	static final long inf=100000000000000000L;
	static final boolean debug=false;
	static Reader in=new Reader();
	static StringBuilder ans=new StringBuilder();
	static long powm(long a, long b, long m)
	{
		long an=1;
		long c=a;
		while(b>0)
		{
			if(b%2==1)
				an=(an*c)%m;
			c=(c*c)%m;
			b>>=1;
		}
		return an;
	}
	static Random rn=new Random();
	static void pd(){if(debug)ans.append("hola");}
	static void pd(Object a){if(debug)ans.append(a+"\n");}
	static void pr(Object a){ans.append(a+"\n");}
	static void pr(){ans.append("\n");}
	static void p(Object a){ans.append(a);}
	static void sop(Object a){System.out.println(a);}
	static int ni(){return in.nextInt();}
	static int[] nia(int n){int a[]=new int[n];for(int i=0; i<n; i++)a[i]=ni();return a;}
	static int[][]nim(int n, int m){int a[][]=new int[n][m];for(int i=0; i<n; i++)for(int j=0; j<n; j++)a[i][j]=ni();return a;}
	static int[] ria(int n){int a[]=new int[n];for(int i=0; i<n; i++){a[i]=rn.nextInt(100);p(a[i]+" ");}pr();return a;}
	static long[] nla(int n){long a[]=new long[n];for(int i=0; i<n; i++)a[i]=nl();return a;}
	static node[] graph(int n) {
		node[] ho=new node[n];
		for(int i=0; i<n; i++)
			ho[i]=new node();
		return ho;
	}
	static String[] nsa(int n){String a[]=new String[n];for(int i=0; i<n; i++)a[i]=ns();return a;}
	static long nl(){return in.nextLong();}
	static String ns(){return in.next();}
	static double nd(){return in.nextDouble();}
	static String pr(String a, long b)
	{
		String c="";
		while(b>0)
		{
			if(b%2==1)
				c=c.concat(a);
			a=a.concat(a);
			b>>=1;
		}
		return c;
	}
	static class Reader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;
        public Reader() {
            reader = new BufferedReader(new InputStreamReader(System.in), 32768);
            tokenizer = null;
        }
        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }
        public int nextInt() {
            return Integer.parseInt(next());
        }
        public long nextLong() {
        	return Long.parseLong(next());
        }
        public double nextDouble() {
        	return Double.parseDouble(next());
        }
    }
}
class node
{
	List<Integer> adj=new ArrayList<Integer>();
}
class tree
{
	List<Integer> vert=new ArrayList<Integer>();	
}