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
3 4
2 5
1 6
3 7
7 8
3 9
2 1 6
2 2 8
1 8
2 2 6
1 8
2 1 7
2 9 5
2 9 4
2 7 10
2 10 3
2 1 5
2 6 9
2 6 10
2 3 3
1 1
2 7 5
2 6 2
2 2 5
2 3 9
1 3
2 8 7
1 9
1 3
2 6 9
1 7
1 10
2 10 3
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
2 4
1 2
2 1 1
2 7 9
2 3 2
2 2 7
2 2 5
1 6
2 7 4
1 7
2 9 1
2 9 2
 10 5 6
1 2
2 3
2 4
4 5
1 6
2 3 1
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
1 45
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
1 4
1 2
 10 5 77
1 2
1 3
3 4
1 5
5 6
1 2
2 3 10
2 5 1
1 2
1 4
2 7 7
2 7 9
1 7
2 4 9
2 2 4
2 3 2
2 5 2
2 10 1
2 3 8
1 9
1 4
1 2
2 8 3
2 8 2
2 2 3
2 5 9
1 10
2 3 10
2 5 9
1 2
1 7
1 4
1 4
1 3
1 4
1 10
2 8 7
1 2
2 3 1
1 10
2 7 7
1 2
1 5
1 3
1 8
2 7 7
1 10
2 4 2
1 9
2 6 6
1 3
1 2
2 8 10
1 1
1 7
2 10 7
1 8
1 9
2 1 4
2 1 1
2 3 3
1 9
1 8
2 9 4
1 4
2 4 4
1 6
2 9 4
2 5 10
1 4
2 8 9
1 10
1 4
1 4
1 10
1 2
1 4
1 7
2 10 8
1 2
2 6 6
2 8 5
 10 4 46
1 2
2 3
1 4
2 5
1 5
1 9
2 6 8
2 10 8
1 1
1 5
1 1
2 6 6
1 8
2 9 3
1 2
1 5
1 2
2 6 5
1 2
1 6
2 5 3
1 5
2 10 5
1 5
2 6 10
2 2 3
2 7 9
2 8 9
1 8
1 3
2 7 1
2 2 2
1 2
1 1
1 5
2 8 7
1 3
1 4
1 3
2 3 1
2 8 8
1 10
1 9
1 10
2 7 10
2 8 9
1 4
2 8 9
1 5
2 6 9
 10 7 26
1 2
2 3
3 4
3 5
4 6
2 7
5 8
2 7 10
1 3
2 8 5
2 9 4
2 5 1
1 5
1 8
1 10
1 3
1 9
1 6
2 1 9
2 5 7
2 1 4
1 6
2 6 7
1 3
1 1
1 3
1 2
2 8 3
2 2 5
1 1
2 7 7
2 5 1
2 1 8
 10 6 21
1 2
2 3
2 4
2 5
4 6
2 7
2 4 1
1 1
2 5 1
1 5
1 3
1 3
1 10
1 5
1 7
1 4
2 6 3
2 7 4
1 10
2 2 5
1 1
1 5
1 8
2 5 7
1 3
2 2 9
1 7

3
0
 2
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2
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0
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0
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 0
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3

import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.InputMismatchException;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.PriorityQueue;
import java.util.Queue;
import java.util.Random;
import java.util.Scanner;
import java.util.Stack;
import java.util.StringTokenizer;
import java.util.TreeMap;
import java.util.TreeSet;

public class main {
	private static InputStream stream;
	private static byte[] buf = new byte[1024];
	private static int curChar;
	private static int numChars;
	private static SpaceCharFilter filter;
	private static PrintWriter pw;
	private static long mod = 1000000000 + 7;
	private static long mod1 = 1000000000 + 9;
	private static int MAX=1000001;
	private static int block;
	private static void soln(){
		int n=nextInt();
		int m=nextInt();
		int q=nextInt();
		DSU dsu=new DSU(n);
		ArrayList<Integer>[] tree=new ArrayList[n];
		for(int i=0;i<n;i++)
			tree[i]=new ArrayList<>();
		for(int i=0;i<m;i++){
			int a=nextInt()-1;
			int b=nextInt()-1;
			dsu.Union(a, b);
			tree[a].add(b);
			tree[b].add(a);
		}
		int[] len=new int[n];
		for(int i=0;i<n;i++){
			if(dsu.find(i)==i){
				len[i]=len(tree,i,n);
			}
		}
		//for(int i=0;i<n;i++)
		//	System.out.print(len[i]+" ");
		//System.out.println();
		for(int i=0;i<q;i++){
			int type=nextInt();
			if(type==1){
				int x=nextInt()-1;
				pw.println(len[dsu.find(x)]);
			}else{
				int x=nextInt()-1;
				int y=nextInt()-1;
				int x1=dsu.find(x);
				int x2=dsu.find(y);
				if(x1!=x2){
					int len1=len[x1];
					int len2=len[x2];
					len[x1]=0;
					len[x2]=0;
					int x3=dsu.Union(x, y);
					//System.out.println(len1+" "+len2);
					len[x3]=Math.max(len1, Math.max(len2,(len1+1)/2 + (len2+1)/2 + 1));
					/*for(int j=0;j<n;j++){
						System.out.print(len[j]+" ");
					}
					System.out.println();*/
				}
			}
		}
	}
	static int ind=-1;
	static int di=-1;
	private static int len(ArrayList<Integer>[] tree,int ind,int n){
		DFS(tree,ind,-1,0);
		DFS(tree,ind,-1,0);
		return di;
	}
	private static void DFS(ArrayList<Integer>[] tree,int cur,int prev,int depth){
		if(depth>di){
			di=depth;
			ind=cur;
		}
		for(int i=0;i<tree[cur].size();i++){
			if(tree[cur].get(i)!=prev){
				DFS(tree,tree[cur].get(i),cur,depth+1);
			}
		}
	}
	private static class Edge{
		int u,v;
		TreeSet<Integer> set;
		public Edge(int a,int b,TreeSet<Integer> s){
			u=a;
			v=b;
			set=s;
		}
	}
	private static class DSU{
		int[] parent;
		int[] rank;
		public DSU(int n){
			parent=new int[n];
			rank=new int[n];
			for(int i=0;i<n;i++){
				parent[i]=i;
				rank[i]=1;
			}
		}
		int find(int i){
	        while(parent[i] !=i){
	        	parent[i]=parent[parent[i]];
	        	i=parent[i];
	        }
	        return i;
	    }
		int Union(int x, int y){
	        int xset = find(x);
	        int yset = find(y);
	        if(rank[xset]<rank[yset]){
	        	parent[xset] = yset;
		        rank[yset]+=rank[xset];
		        rank[xset]=0;
		        return yset;
	        }else{
	        	parent[yset]=xset;
	        	rank[xset]+=rank[yset];
	        	rank[yset]=0;
	        	return xset;
	        }
	    }
	}
	static class Hashing {
	  	  static final int multiplier = 43;
	  	  static final Random rnd = new Random();
	  	  static final int mod1 = BigInteger.valueOf((int) (1e9 + rnd.nextInt((int) 1e9))).nextProbablePrime().intValue();
	  	  static final int mod2 = BigInteger.valueOf((int) (1e9 + rnd.nextInt((int) 1e9))).nextProbablePrime().intValue();
	  	  static final int invMultiplier1 = BigInteger.valueOf(multiplier).modInverse(BigInteger.valueOf(mod1)).intValue();
	  	  static final int invMultiplier2 = BigInteger.valueOf(multiplier).modInverse(BigInteger.valueOf(mod2)).intValue();
	  	  long[] hash1, hash2;
	  	  long[] inv1, inv2;
	  	  int n;
	  	  public Hashing(String s){
	  	    n = s.length();
	  	    hash1 = new long[n + 1];
	  	    hash2 = new long[n + 1];
	  	    inv1 = new long[n + 1];
	  	    inv2 = new long[n + 1];
	  	    inv1[0] = 1;
	  	    inv2[0] = 1;
	  	    long p1 = 1;
	  	    long p2 = 1;
	  	    for (int i = 0; i < n; i++) {
	  	      hash1[i + 1] = (hash1[i] + s.charAt(i) * p1) % mod1;
	  	      p1 = p1 * multiplier % mod1;
	  	      inv1[i + 1] = inv1[i] * invMultiplier1 % mod1;
	  	      hash2[i + 1] = (hash2[i] + s.charAt(i) * p2) % mod2;
	  	      p2 = p2 * multiplier % mod2;
	  	      inv2[i + 1] = inv2[i] * invMultiplier2 % mod2;
	  	    }
	  	  }
	  	  public long getHash(int i, int len) {
	  	    return (((hash1[i + len] - hash1[i] + mod1) * inv1[i] % mod1) << 32)
	  	        + (hash2[i + len] - hash2[i] + mod2) * inv2[i] % mod2;
	  	  }
	}
	public static class Segment {
		private int[] tree;
		private int[] base;
		private int size;
		private int n;
		private class node{
			private int a;
			private int b;
			private int c;
			public node(int x,int y,int z){
				a=x;
				b=y;
				c=z;
			}
		}
		public Segment(int n,int[] arr){
			this.base=arr;
			int x = (int) (Math.ceil(Math.log(n) / Math.log(2)));
	        size = 2 * (int) Math.pow(2, x) - 1;
			tree=new int[size];
			this.n=n;
			build(0,0,n-1);
		}
		private void build(int id,int l,int r){
			//pw.println(1);
			if(r==l){
				tree[id]=base[l];
				return;
			}
			int mid=l+(r-l)/2;
			//System.out.println(2*id+1+" "+l+" "+mid);
			build(2*id+1,l,mid);
			//System.out.println(2*id+2+" "+(mid+1)+" "+r);
			build(2*id+2,mid+1,r);
			tree[id]=tree[2*id+1]^tree[2*id+2];
		}
		public int query(int l,int r){
			return queryUtil(l,r,0,0,n-1);
		}
		private int queryUtil(int x,int y,int id,int l,int r){
			if(l>y || x>r) 
				return 0;
			if(x <= l && r<=y)
				return tree[id];
			int mid=l+(r-l)/2;
			return queryUtil(x,y,2*id+1,l,mid)^queryUtil(x,y,2*id+2,mid+1,r);
		}
		/*private void cnt(int id,int l,int r,HashSet<Integer> set){
			if(tree[id]!=0){
				set.add(tree[id]);
				return;
			}
			if(r==l)
				return;
			int mid=l+(r-l)/2;
			cnt(2*id+1,l,mid,set);
			cnt(2*id+2,mid+1,r,set);
		}*/
		public void update(int x,int colour,int id,int l,int r){
			if(x>r || x<l)
				return;
			if(l==r){
				tree[id]^=colour;
				return;
			}
			int mid=l+(r-l)/2;
			//shift(id);
			update(x,colour,2*id+1,l,mid);
			update(x,colour,2*id+2,mid+1,r);
			tree[id]=tree[2*id+1]^tree[2*id+2];
		}
		private void shift(int id){
			if(tree[id]!=0){
				tree[2*id+1]=tree[2*id+2]=tree[id];
			}
			tree[id]=0;
		}
	}

	static void multiply(long[][] a, long[][] b,long m){
		int n=a.length;
	    long[][] mul=new long[n][n];
	    for (int i = 0; i < n; i++){
	        for (int j = 0; j < n; j++){
	            mul[i][j] = 0;
	            for (int k = 0; k < n; k++)
	                mul[i][j] = (mul[i][j]+(a[i][k]*b[k][j])%m)%m;
	        }
	    }
	    for (int i=0; i<n; i++)
	        for (int j=0; j<n; j++)
	            a[i][j] =mul[i][j];
	}
	static class Pair implements Comparable<Pair>{
		int p;
		int c;
		int b;
		public Pair(int t,int x,int y){
			p=t;
			c=x;
			b=y;
		}
		@Override
		public int compareTo(Pair arg0) {
			return this.p-arg0.p;
		}
		
	}
	private static long pow(long a, long b, long c) {
		if (b == 0)
			return 1;
		long p = pow(a, b / 2, c);
		p = (p * p) % c;
		return (b % 2 == 0) ? p : (a * p) % c;
	}
	
	private static class Mo implements Comparable<Mo>{
		int l;
		int r;
		int i;
		public Mo(int a,int b,int ind) {
			l=a;r=b;i=ind;
		}
		@Override
		public int compareTo(Mo arg0) {
			int b1=this.l/block;
			int b2=arg0.l/block;
			return (b1!=b2)?(b1-b2):(this.r-arg0.r);
		}
	}

	private static long gcd(long n, long l) {
		if (l == 0)
			return n;
		return gcd(l, n % l);
	}

	private static long max(long a, long b) {
		if (a > b)
			return a;
		return b;
	}

	private static long min(long a, long b) {
		if (a < b)
			return a;
		return b;
	}

	public static void main(String[] args) throws Exception {
		new Thread(null,new Runnable(){
			@Override
			public void run() {
				/*try {
					InputReader(new FileInputStream("C:\\Users\\hardik\\Desktop\\C-small-1-attempt1.in"));
				} catch (FileNotFoundException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}*/
				InputReader(System.in);
				pw = new PrintWriter(System.out);
				/*try {
					pw=new PrintWriter(new FileOutputStream("C:\\Users\\hardik\\Desktop\\out.txt"));
				} catch (FileNotFoundException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}*/
				soln();
				pw.close();
			}
		},"1",1<<26).start();
	}

	public static void InputReader(InputStream stream1) {
		stream = stream1;
	}

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

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

	private static int read() {
		if (numChars == -1)
			throw new InputMismatchException();
		if (curChar >= numChars) {
			curChar = 0;
			try {
				numChars = stream.read(buf);
			} catch (IOException e) {
				throw new InputMismatchException();
			}
			if (numChars <= 0)
				return -1;
		}
		return buf[curChar++];
	}

	private static 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;
	}

	private static 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;
	}

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

	private static 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();
	}

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

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

	private static void pArray(int[] arr) {
		for (int i = 0; i < arr.length; i++) {
			System.out.print(arr[i] + " ");
		}
		System.out.println();
		return;
	}

	private static void pArray(long[] arr) {
		for (int i = 0; i < arr.length; i++) {
			System.out.print(arr[i] + " ");
		}
		System.out.println();
		return;
	}

	private static boolean isSpaceChar(int c) {
		if (filter != null)
			return filter.isSpaceChar(c);
		return isWhitespace(c);
	}
	private static char nextChar() {
		int c = read();
		while (isSpaceChar(c))
			c = read();
		char c1=(char)c;
		while(!isSpaceChar(c))
			c=read();
		return c1;
	}
	private interface SpaceCharFilter {
		public boolean isSpaceChar(int ch);
	}
}