10 3 5
1 2
2 3
1 4
2 3 6
1 6
2 1 6
2 8 7
1 10
 10 2 6
1 2
1 3
2 1 8
2 9 2
1 2
1 9
2 3 5
1 8
 10 5 2
1 2
1 3
1 4
2 5
1 6
1 5
1 8
 10 6 64
1 2
2 3
2 4
4 5
3 6
3 7
2 4 4
1 4
1 6
1 5
1 8
2 1 10
2 6 8
2 4 2
1 10
1 6
2 4 3
2 5 9
1 4
2 8 7
2 3 6
2 8 5
2 7 3
2 10 7
2 9 3
1 8
2 7 5
2 6 10
2 5 9
1 10
2 8 9
1 2
2 9 10
2 5 1
2 10 1
2 3 9
2 10 2
2 5 4
1 1
1 5
2 7 5
1 7
2 9 5
2 8 2
1 3
1 10
2 8 8
2 8 2
2 9 8
2 7 10
1 1
1 6
2 1 6
1 2
1 10
2 6 4
1 3
2 6 6
2 10 3
2 3 5
1 2
2 1 7
2 4 4
1 9
1 10
1 5
2 8 3
1 6
1 4
1 8
 10 9 16
1 2
1 3
2 4
2 5
4 6
4 7
6 8
4 9
5 10
2 1 5
2 4 4
1 7
1 8
1 6
1 4
1 10
1 4
2 1 5
2 8 10
2 5 5
2 7 3
2 8 7
2 7 7
2 7 3
2 4 6
 10 5 42
1 2
1 3
2 4
4 5
1 6
1 4
2 9 2
2 10 5
1 4
2 2 7
2 10 5
2 6 10
1 4
1 4
1 2
2 7 8
1 7
2 4 4
2 10 6
2 9 3
1 9
1 2
2 8 1
1 8
2 3 5
1 8
2 5 5
2 2 7
2 8 5
1 9
1 1
2 4 4
2 6 6
2 1 7
1 6
2 8 3
2 7 4
1 8
2 3 6
2 8 6
2 3 6
2 9 3
1 3
1 9
2 3 7
1 2
1 7
 100 22 4
100 24
100 27
100 4
100 60
24 63
63 17
27 89
17 71
63 77
77 43
63 9
100 65
24 14
27 15
60 10
71 16
100 67
10 1
1 40
10 83
43 66
67 18
1 6
1 27
1 6
1 49
 10 7 48
1 2
2 3
2 4
3 5
4 6
6 7
7 8
2 7 4
1 2
2 7 4
1 2
2 5 6
2 3 4
1 8
2 4 4
2 10 3
2 1 3
1 10
1 8
2 2 7
2 2 9
1 10
2 6 7
2 3 6
2 8 1
2 2 6
1 7
2 1 2
1 3
2 4 1
2 5 6
2 7 1
2 4 2
2 1 9
2 6 9
2 6 1
1 1
1 2
1 1
2 2 3
1 4
2 2 2
2 4 7
2 5 5
2 5 7
1 5
2 8 7
1 9
2 10 9
1 9
2 6 6
2 1 1
2 3 3
1 9
2 7 4
 10 4 4
1 2
1 3
3 4
2 5
1 5
1 2
1 3
1 5
 10 7 7
1 2
1 3
2 4
2 5
4 6
5 7
3 8
2 4 7
2 6 4
1 2
2 10 3
1 9
1 8
1 8
 10 5 10
1 2
1 3
3 4
2 5
1 6
2 7 3
1 5
2 3 4
1 3
1 8
1 8
1 8
1 9
2 5 3
2 6 5
 10 1 14
1 2
1 1
1 8
1 9
2 2 5
1 9
1 6
2 10 9
2 4 8
1 4
2 1 10
2 2 4
1 10
2 8 10
2 7 4
 100 10 30
58 81
58 7
58 74
74 97
81 56
81 15
15 49
97 45
97 47
58 34
2 52 44
2 55 79
2 52 5
1 48
2 60 35
2 37 82
2 77 52
2 9 23
2 25 61
2 63 34
1 81
2 47 20
1 79
2 34 19
1 70
1 36
2 27 85
2 52 89
1 25
2 46 46
1 52
1 33
1 70
2 29 56
2 3 73
2 37 46
2 29 83
1 1
1 4
1 45
 10 8 43
1 2
2 3
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1 6
3 7
7 8
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2 2 8
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2 10 3
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2 6 9
2 6 10
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2 7 5
2 6 2
2 2 5
2 3 9
1 3
2 8 7
1 9
1 3
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1 7
1 10
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2 10 2
2 5 7
2 10 5
1 10
1 7
1 10
1 2
1 6
2 3 10
1 3
1 5
1 6
1 5
1 8
1 7
2 5 8
 10 3 11
1 2
1 3
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1 2
2 1 1
2 7 9
2 3 2
2 2 7
2 2 5
1 6
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1 7
2 9 1
2 9 2
 10 5 6
1 2
2 3
2 4
4 5
1 6
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2 6 4
2 1 1
1 5
1 6
1 4
 10 6 7
1 2
2 3
1 4
3 5
1 6
5 7
1 1
2 8 10
1 10
2 9 5
1 7
1 4
2 1 9
 100 16 46
36 42
36 50
42 54
42 74
50 58
42 16
50 81
50 96
42 62
54 2
74 75
74 22
2 48
50 95
74 66
75 5
1 62
1 56
2 6 68
1 47
1 43
1 38
1 75
2 22 82
2 56 77
1 71
2 52 15
2 9 1
2 12 59
1 24
2 41 94
2 18 58
2 22 67
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2 68 70
1 81
1 48
1 71
2 76 28
2 31 73
2 58 80
2 100 57
2 88 79
1 30
2 96 23
2 92 44
1 12
1 66
1 24
2 71 68
2 4 4
2 84 43
2 80 15
2 54 13
1 51
2 99 17
1 63
2 12 41
2 1 2
2 62 96
2 79 9
2 59 79
 10 1 9
1 2
1 5
2 7 4
1 4
1 7
2 2 5
2 6 3
1 3
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1 2
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2 5 1
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1 10
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1 2
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1 2
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1 10
2 4 2
1 9
2 6 6
1 3
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1 1
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1 8
1 9
2 1 4
2 1 1
2 3 3
1 9
1 8
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1 4
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1 6
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2 5 10
1 4
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1 10
1 4
1 4
1 10
1 2
1 4
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2 10 8
1 2
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2 8 5
 10 4 46
1 2
2 3
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1 5
1 9
2 6 8
2 10 8
1 1
1 5
1 1
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1 8
2 9 3
1 2
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1 2
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1 2
1 6
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1 5
2 10 5
1 5
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2 2 3
2 7 9
2 8 9
1 8
1 3
2 7 1
2 2 2
1 2
1 1
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1 3
1 4
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1 10
1 9
1 10
2 7 10
2 8 9
1 4
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1 5
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 10 7 26
1 2
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3 4
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1 3
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2 5 1
1 5
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2 1 4
1 6
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1 3
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1 1
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 10 6 21
1 2
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1 10
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1 1
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1 3
2 2 9
1 7

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import java.io.*;
import java.math.*;
import java.util.*;

import static java.util.Arrays.fill;
import static java.lang.Math.*;
import static java.util.Arrays.sort;
import static java.util.Collections.sort;


public class C455 
{

	public static int mod = 1000000007;
	public static long INF = (1L << 60);
	static FastScanner2 in = new FastScanner2();
	static OutputWriter out = new OutputWriter(System.out);
 
	static int n;
	static int m;
	static ArrayList<Integer>[] adjlist;
	static int[] parent;
	static int[] size;
	static int[] diameter;
	static int[] depth;
	static boolean[] used;
	
	public static int getroot(int i)
	{
		if(parent[i]==i)
			return i;
		return getroot(parent[i]);
	}
	
	public static void union(int u,int v)
	{
		int x=getroot(u);
		int y=getroot(v);
		if(x==y)
			return;
		if(size[x]>size[y])
		{
			union(v, u);
			return;
		}
		size[y]+=size[x];
		diameter[y]=max(diameter[x], max(diameter[y], (diameter[x]+1)/2+(diameter[y]+1)/2+1));
		parent[x]=y;
	}
	
	public static void dfs(int v,int p,int dep)
	{
		used[v]=true;
		depth[v]=dep;
		for(int u : adjlist[v])
		{
			if(u==p)
				continue;
			dfs(u, v, dep+1);
		}
	}
	
	public static int finddiameter(int v)
	{
		dfs(v, -1, 0);
		int maxi=-1;
		int ver=0;
		for(int i=1;i<=n;i++)
		{
			if(depth[i]>maxi)
			{
				maxi=depth[i];
				ver=i;
			}
		}
		dfs(ver, -1, 0);
		maxi=-1;
		for(int i=1;i<=n;i++)
		{
			maxi=max(maxi, depth[i]);
		}
		return maxi;
	}
	
	public static void main(String[] args) 
	{

		n=in.nextInt();
		m=in.nextInt();
		int q=in.nextInt();
		adjlist=new ArrayList[n+1];
		parent=new int[n+1];
		diameter=new int[n+1];
		size=new int[n+1];
		used=new boolean[n+1];
		depth=new int[n+1];
		for(int i=1;i<=n;i++)
		{
			parent[i]=i;
			size[i]=1;
			adjlist[i]=new ArrayList<>();
		}
		for(int i=1;i<=m;i++)
		{
			int u=in.nextInt();
			int v=in.nextInt();
			adjlist[u].add(v);
			adjlist[v].add(u);
			union(u, v);
		}
		
		for(int i=1;i<=n;i++)
		{
			if(!used[i])
			{
				diameter[getroot(i)]=finddiameter(i);
			}
		}
		while(q-->0)
		{
			int type=in.nextInt();
			if(type==1)
			{
				out.println(diameter[getroot(in.nextInt())]);
			}
			else
			{
				int u=in.nextInt();
				int v=in.nextInt();
				if(getroot(u)==getroot(v))
					continue;
				else
					union(u, v);
			}
		}
		out.close();
		

	}
	

	static class FastScanner2 
	{
		private byte[] buf = new byte[1024];
		private int curChar;
		private int snumChars;

		public int read() 
		{
			if (snumChars == -1)
				throw new InputMismatchException();
			if (curChar >= snumChars) 
			{
				curChar = 0;
				try 
				{
					snumChars = System.in.read(buf);
				} catch (IOException e) 
				{
					throw new InputMismatchException();
				}
				if (snumChars <= 0)
					return -1;
			}
			return buf[curChar++];
		}

		public String nextLine() 
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			StringBuilder res = new StringBuilder();
			do 
			{
				res.appendCodePoint(c);
				c = read();
			} 
			while (!isEndOfLine(c));
			return res.toString();
		}

		public String nextString() 
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			StringBuilder res = new StringBuilder();
			do 
			{
				res.appendCodePoint(c);
				c = read();
			} 
			while (!isSpaceChar(c));
			return res.toString();
		}

		public long nextLong()
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			long res = 0;
			do 
			{
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			} 
			while (!isSpaceChar(c));
			return res * sgn;
		}

		public int nextInt() 
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			int res = 0;
			do 
			{
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			} 
			while (!isSpaceChar(c));
			return res * sgn;
		}

		public int[] nextIntArray(int n)
		{
			int[] arr = new int[n];
			for (int i = 0; i < n; i++) 
			{
				arr[i] = nextInt();
			}
			return arr;
		}

		public long[] nextLongArray(int n)
		{
			long[] arr = new long[n];
			for (int i = 0; i < n; i++) 
			{
				arr[i] = nextLong();
			}
			return arr;
		}

		private boolean isSpaceChar(int c)
		{
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}

		private boolean isEndOfLine(int c) 
		{
			return c == '\n' || c == '\r' || c == -1;
		}
	}


	static class OutputWriter 
	{
		private final PrintWriter writer;

		public OutputWriter(OutputStream outputStream) 
		{
			writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
		}

		public OutputWriter(Writer writer)
		{
			this.writer = new PrintWriter(writer);
		}

		public void print(Object... objects)
		{
			for (int i = 0; i < objects.length; i++) 
			{
				if (i != 0)
					writer.print(' ');
				writer.print(objects[i]);
			}
		}

		public void println(Object... objects)
		{
			print(objects);
			writer.println();
		}

		public void close() 
		{
			writer.close();
		}

		public void flush() 
		{
			writer.flush();
		}
	}
private static boolean oj = System.getProperty("ONLINE_JUDGE") != null;
	
	private static void debug(Object... o) 
	{
		if (!oj)
			System.out.println(Arrays.deepToString(o));
	}
	private static void tr(Object... o) 
	{
		if (!oj)
			System.out.println(Arrays.deepToString(o));
	}
}