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import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.InputMismatchException;

public class C455{

	void solve()
	{
		int n = ni(), m = ni(), Q = ni();
		DJSet ds = new DJSet(n);
		for(int i=0;i<m;i++)
			ds.union(ni() - 1, ni() - 1);
		while(Q-->0)
		{
			if(ni() == 1)
				out.println(ds.diam[ds.root(ni()-1)]);
			else
				ds.union(ni() - 1, ni() - 1);
		}
	}
	
	public class DJSet {

		public int[] root;
		public int[] size;
		public int[] diam;
		public boolean[] head;
		public int setCount;
		
		public DJSet(int n)
		{
			root = new int[n];
			size = new int[n];
			diam = new int[n];
			head = new boolean[n];
			setCount = n;
			for(int i=0;i<n;i++)
			{
				root[i] = i;
				size[i] = 1;
				head[i] = true;
			}
		}
		
		public int root(int x)
		{
			int y = x;
			while(root[x]!=x)
				x = root[root[x]];
			root[y] = x;
			return x;
		}
		
		public boolean union(int x,int y)
		{
			int a = root(x);
			int b = root(y);
			
			if(a==b)
				return false;
			
			setCount--;
			
			if(size[a]<size[b])
			{
				head[a] = false;
				root[a] = b;
				size[b] += size[a];
				diam[b] = Math.max((diam[a]+1)/2 + (diam[b]+1)/2 + 1, Math.max(diam[a], diam[b]));
			}
			else
			{
				head[b] = false;
				root[b] = a;
				size[a] += size[b];
				diam[a] = Math.max((diam[a]+1)/2 + (diam[b]+1)/2 + 1, Math.max(diam[a], diam[b]));
			}
			return true;
		}
		
		public boolean find(int x,int y)
		{ return root(x)==root(y); }
		
		public int[] getSets()
		{
			int[] heads = new int[setCount];
			int ptr = 0;
			for(int i=0;i<head.length;i++)
				if(head[i])
					heads[ptr++] = i;
			return heads;
		}
		
	}
	
	public static void main(String[] args){new C455().run();}
	
	private byte[] bufferArray = new byte[1024];
	private int bufLength = 0;
	private int bufCurrent = 0;
	InputStream inputStream;
	PrintWriter out;
	
	public void run()
	{
		inputStream = System.in;
		out = new PrintWriter(System.out);
		solve();
		out.flush();
	}
	
	int nextByte()
	{
		if(bufLength==-1)
			throw new InputMismatchException();
		if(bufCurrent>=bufLength)
		{
			bufCurrent = 0;
			try
			{bufLength = inputStream.read(bufferArray);}
			catch(IOException e)
			{ throw new InputMismatchException();}
			if(bufLength<=0)
				return -1;
		}
		return bufferArray[bufCurrent++];
	}
	
	boolean isSpaceChar(int x)
	{return (x<33 || x>126);}
	
	boolean isDigit(int x)
	{return (x>='0' && x<='9');}
	
	int nextNonSpace()
	{
		int x;
		while((x=nextByte())!=-1 && isSpaceChar(x));
		return x;
	}
	
	int ni()
	{
		long ans = nl();
		if ( Integer.MIN_VALUE <= ans && ans <= Integer.MAX_VALUE )
			return (int)ans;
		throw new InputMismatchException();
	}
	
	long nl()
	{
		long ans = 0;
		boolean neg = false;
		int x = nextNonSpace();
		if(x=='-') 
		{
			neg = true;
			x = nextByte();
		}
		while(!isSpaceChar(x))
		{
			if(isDigit(x))
			{
				ans = ans*10 + x -'0';
				x = nextByte();
			}
			else
				throw new InputMismatchException();
		}
		return neg ? -ans:ans;
	}
	
	String ns()
	{
		StringBuilder sb = new StringBuilder();
		int x = nextNonSpace();
		while(!isSpaceChar(x))
		{
			sb.append((char)x);
			x = nextByte();
		}
		return sb.toString();
	}
	
	char nc()
	{ return (char)nextNonSpace();}
	
	double nd()
	{ return (double)Double.parseDouble(ns()); }
	
	char[] ca()
	{ return ns().toCharArray();}
	
	char[] ca(int n)
	{
		char[] ans = new char[n];
		int p =0;
		int x = nextNonSpace();
		while(p<n)
		{
			ans[p++] = (char)x;
			x = nextByte();
		}
		return ans;
	}
	
	int[] ia(int n)
	{
		int[] ans = new int[n];
		for(int i=0;i<n;i++)
			ans[i]=ni();
		return ans;
	}
	
}
