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
2
2
 3
0
 4
4
4
0
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
 5
5
5
5
5
5
 4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
 0
9
0
0
 6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
 4
4
4
4
 5
0
5
5
 4
4
0
0
0
0
 1
0
0
0
0
1
4
 0
6
1
0
0
1
2
0
0
0
0
6
 5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
 3
0
4
 4
4
4
 5
1
5
5
 6
0
0
0
0
6
0
0
0
6
6
0
0
1
6
0
0
0
 0
1
1
1
1
2
 4
4
4
1
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
 3
0
3
3
3
2
3
3
3
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
 4
4
4
4
4
4
4
4
4
4
4
4
4
 3
3
3
3
0
3
3
3
0
3
3
0
3
3


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

import static java.lang.Math.*;

public class Solution implements Runnable {
	
	ArrayList<Integer> g[];
	int color[];
	int di[];
	
	int getRoot(int v) {
		return (v == color[v] ? v : (color[v] = getRoot(color[v])));
	}
	
	void merge(int v, int u) {
		v = getRoot(v);
		u = getRoot(u);
		if (new Random().nextInt(1000) < 500)
			color[v] = u;
		else
			color[u] = v;
	}
	
	int[] go(int v, int pr) {
		int res[] = new int[2];
		res[0] = -1;
		for (int i = 0; i < g[v].size(); i++) {
			if (g[v].get(i) != pr) {
				int tmp[] = go(g[v].get(i), v);
				if (res[0] < tmp[0]) {
					res[0] = tmp[0];
					res[1] = tmp[1];
				}
			}
		}
		res[0]++;
		return res;
	}
	
	int go2(int v, int pr) {
		int mx = -1;
		for (int i = 0; i < g[v].size(); i++) {
			if (g[v].get(i) != pr) {
				mx = max(mx, go2(g[v].get(i), v));
			}
		}
		mx++;
		return mx;
	}
	
	void solve() throws Exception {
		int n = sc.nextInt();
		int m = sc.nextInt();
		int q = sc.nextInt();
		g = new ArrayList[n];
		color = new int[n];
		di = new int[n];
		for (int i = 0; i < n; i++) {
			color[i] = i;
			g[i] = new ArrayList<Integer>();
		}
		for (int i = 0; i < m; i++) {
			int v = sc.nextInt() - 1;
			int u = sc.nextInt() - 1;
			g[v].add(u);
			g[u].add(v);
			merge(v, u);
		}
		boolean used[] = new boolean[n];
		int res[][] = new int[n][];
		int cnt = 0;
		for (int i = 0; i < n; i++) {
			int v = getRoot(i);
			if (!used[v]) {
				res[cnt++] = go(v, -1);
			}
		}
		for (int i = 0; i < cnt; i++) {
			int v = res[i][1];
			int root = getRoot(v);
			di[root] = go2(v, -1);
		}
		while (q-- > 0) {
			int tp = sc.nextInt();
			if (tp == 1) {
				int v = getRoot(sc.nextInt() - 1);
				out.println(di[v]);
			} else {
				int v = getRoot(sc.nextInt() - 1);
				int u = getRoot(sc.nextInt() - 1);
				if (v != u) {
					int ndi = max(max(di[v], di[u]), (di[v] + 1) / 2 + (di[u] + 1) / 2 + 1);
					merge(v, u);
					v = getRoot(v);
					di[v] = ndi;
				}
			}
		}
	}
	
	BufferedReader in;
	PrintWriter out;
	FastScanner sc;
	
	static Throwable throwable;
	
	public void run() {
		try {
			in = new BufferedReader(new InputStreamReader(System.in));
			out = new PrintWriter(System.out);
			//in = new BufferedReader(new FileReader(".in"));
			//out = new PrintWriter(".out");
			sc = new FastScanner(in);
			solve();
		} catch (Exception e) {
			throwable = e;
		} finally {
			out.close();
		}
	}

	public static void main(String[] args) throws Throwable {
		Thread thread = new Thread(null, new Solution(), "", (1 << 26));
		thread.start();
		thread.join();
		thread.run();
		if (Solution.throwable != null)
			throw Solution.throwable;
	}

}

class FastScanner {
	BufferedReader reader;
	StringTokenizer strTok;
	
	public FastScanner(BufferedReader reader) {
		this.reader = reader;
	}
	
	public String nextToken() throws Exception {
		while (strTok == null || !strTok.hasMoreTokens())
			strTok = new StringTokenizer(reader.readLine());
		return strTok.nextToken();
	}
	
	public int nextInt() throws Exception {
		return Integer.parseInt(nextToken());
	}
	
	public long nextLong() throws Exception {
		return Long.parseLong(nextToken());
	}
	
	public double nextDouble() throws Exception {
		return Double.parseDouble(nextToken());
	}
}