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

import static java.util.Arrays.*;

public class C {
	private static final int mod = (int)1e9+7;

	final Random random = new Random(0);
	final IOFast io = new IOFast();

	/// MAIN CODE
	void check() {
		{
			long t1 = System.currentTimeMillis();
			int x = 0, y = 1;
			for(int i = 0; i < 1000000000; i++) {
				int t = x;
				x = y;
				y += t;
			}
			System.err.println((System.currentTimeMillis() - t1) + " " + x + " " + y);
		}
		{
			long t1 = System.currentTimeMillis();
			Integer x = 0, y = 1;
			for(int i = 0; i < 1000000000; i++) {
				Integer t = x;
				x = y;
				y += t;
			}
			System.err.println((System.currentTimeMillis() - t1) + " " + x + " " + y);
		}
	}
	
	SimpleAdjListGraph union(SimpleAdjListGraph... gs) {
		int V = 0;
		int E = 2;
		for(SimpleAdjListGraph gg : gs) {
			V += gg.V;
			E += gg.E;
		}
		SimpleAdjListGraph g = new SimpleAdjListGraph(V, E);
		int v0 = 0;
		for(SimpleAdjListGraph gg : gs) {
			for(int v = 0; v < gg.V; v++) {
				for(int e = gg.head[v]; e != -1; e = gg.next[e]) {
					g.addEdge(v + v0, gg.to[e] + v0);
				}
			}
			v0 += gg.V;
		}
		return g;
	}
	
	public void run() throws IOException {
//		check();
//		int TEST_CASE = Integer.parseInt(new String(io.nextLine()).trim());
		int TEST_CASE = 1;
		while(TEST_CASE-- != 0) {
			int n = io.nextInt();
			int m = io.nextInt();
			int q = io.nextInt();
			int[][] es = new int[m][3];
			UnionFind uf = new UnionFind(n);
			for(int i = 0; i < m; i++) {
				int s = io.nextInt() - 1;
				int t = io.nextInt() - 1;
				es[i][0] = s;
				es[i][1] = t;
				uf.union(s, t);
			}
			for(int i = 0; i < m; i++) {
				es[i][2] = uf.root(es[i][0]);
			}
			arrayIntSort(es, 2);
			TreeMap<Integer, int[]> mp = new TreeMap<>();
			for(int i = 0, j; i < m; i = j) {
				int id = 0;
				TreeMap<Integer, Integer> mp2 = new TreeMap<>();
				for(j = i; j < m && es[i][2] == es[j][2]; j++) {
					if(!mp2.containsKey(es[j][0])) mp2.put(es[j][0], id++);
					if(!mp2.containsKey(es[j][1])) mp2.put(es[j][1], id++);
				}
				SimpleAdjListGraph g = new SimpleAdjListGraph(id, (j - i) * 2);
				for(j = i; j < m && es[i][2] == es[j][2]; j++) {
					g.addEdge(mp2.get(es[j][0]), mp2.get(es[j][1]));
					g.addEdge(mp2.get(es[j][1]), mp2.get(es[j][0]));
				}
				int[] d1 = new int[g.V];
				int[] d2 = new int[g.V];
				int f = g.farthest(d1);
				g.bfs(d2, g.farthestVertex(d1));
				int dis = Integer.MAX_VALUE;
				for(int k = 0; k < g.V; k++) {
					if(Math.max(d1[k], d2[k]) < dis) {
						dis = Math.max(d1[k], d2[k]);
					}
				}
//				System.err.println(Arrays.toString(d1));
//				System.err.println(Arrays.toString(d2));
//				System.err.println(i + " " + j + " " + dis + " " + f);
				mp.put(es[i][2], new int[] { dis, f });
			}
			for(int i = 0; i < n; i++) {
				if(uf.size(i) == 1) {
					mp.put(i, new int[] { 0, 0, });
				}
			}
			
			for(int i = 0; i < q; i++) {
				int t = io.nextInt();
				if(t == 1) {
					int x = io.nextInt() - 1;
					io.out.println(mp.get(uf.root(x))[1]);
				}
				else {
					int x = io.nextInt() - 1;
					int y = io.nextInt() - 1;
					if(!uf.same(x, y)) {
						int[] g1 = mp.get(uf.root(x));
						int[] g2 = mp.get(uf.root(y));
						uf.union(x, y);
						int n1 = g1[0];
						int f1 = g1[1];
						int n2 = g2[0];
						int f2 = g2[1];
						g1[0] = Math.max(n1 + 1, n2 + 1);
						g1[1] = Math.max(f1, Math.max(f2, n1 + n2 + 1));
						mp.put(uf.root(x), g1);
//						System.err.println(g1[0] + " " + g1[1]);
					}
				}
			}
		}
	}
	
	static
	class UnionFind {
		private int[] data;
		
		public UnionFind(int size) {
			data = new int[size];
			clear();
		}
		
		public UnionFind(final UnionFind uf) {
			data = uf.data.clone();
		}
		
		public void clear() {
			Arrays.fill(data, -1);
		}
		
		public int root(int x) { return data[x] < 0 ? x : (data[x] = root(data[x])); }
		
		public void union(int x, int y) {
			if((x = root(x)) != (y = root(y))) {
				if(data[y] < data[x]) { final int t = x; x = y; y = t; }
				data[x] += data[y];
				data[y] = x;
			}
		}
		
		public boolean same(int x, int y) { return root(x) == root(y); }
		public int size(int x) { return -data[root(x)]; }
	}

	
	static
	class SimpleAdjListGraph {
		int m, V, E;
		int[] head, next, to;
		
		static SimpleAdjListGraph read(final IOFast io) throws IOException {
			int n = io.nextInt();
			int m = io.nextInt();
			SimpleAdjListGraph g = new SimpleAdjListGraph(n, 2 * m);
			for(int i = 0; i < m; i++) {
				final int s = io.nextInt() - 0;
				final int t = io.nextInt() - 0;
				g.addEdge(s, t);
				g.addEdge(t, s);
			}
			return g;
		}

		public SimpleAdjListGraph(int V, int E) {
			head = new int[V];
			next = new int[E];
			to = new int[E];
			this.V = V;
			this.E = E;
			clear();
		}

		public void clear() {
			m = 0;
			Arrays.fill(head, -1);
		}

		public void removeEdge(int s) {
			--m;
			head[s] = next[m];
		}

		public void addEdge(int s, int t) {
			next[m] = head[s];
			head[s] = m;
			to[m++] = t;
		}
		
		int farthestVertex(final int[] dist) {
			int ret = 0;
			for(int i = 0; i < dist.length; i++) {
				if(dist[ret] < dist[i]) {
					ret = i;
				}
			}
			return ret;
		}
		
		
		int farthest(int[] dist) {
			bfs(dist, 0);
			final int v0 = farthestVertex(dist);
			bfs(dist, v0);
//			final int v1 = farthestVertex(dist[1]);
//			return new int[] { v0, v1, };
			return dist[farthestVertex(dist)];
		}

		int[] q;
		public int bfs(final int[] dist, final int src) {
			if(q == null) {
				q = new int[2 * head.length + 10];
			}
			int s = 0, t = 0;
			
			Arrays.fill(dist, -1);
			dist[src] = 0;
			q[t++] = src;
			while(s != t) {
				final int v = q[s++];
				for(int e = head[v]; e != -1; e = next[e]) {
					final int u = to[e];
					if(dist[u] == -1) {
						dist[u] = dist[v] + 1;
						q[t++] = u;
					}
				}
			}
			int ret = 0;
			for(int a : dist) ret = Math.max(ret, a);
			return ret;
		}
	}


	/// TEMPLATE
	static int gcd(int n, int r) { return r == 0 ? n : gcd(r, n%r); }
	static long gcd(long n, long r) { return r == 0 ? n : gcd(r, n%r); }
	
	static <T> void swap(T[] x, int i, int j) {
		T t = x[i];
		x[i] = x[j];
		x[j] = t;
	}
	
	static void swap(int[] x, int i, int j) {
		int t = x[i];
		x[i] = x[j];
		x[j] = t;
	}
	

	static void radixSort(int[] xs) {
		int[] cnt = new int[(1<<16)+1];
		int[] ys = new int[xs.length];
		
		for(int j = 0; j <= 16; j += 16) {
			Arrays.fill(cnt, 0);
			for(int x : xs) { cnt[(x>>j&0xFFFF)+1]++; }
			for(int i = 1; i < cnt.length; i++) { cnt[i] += cnt[i-1]; }
			for(int x : xs) { ys[cnt[x>>j&0xFFFF]++] = x; }
			{ final int[] t = xs; xs = ys; ys = t; }
		}
	}
	
	static void radixSort(long[] xs) {
		int[] cnt = new int[(1<<16)+1];
		long[] ys = new long[xs.length];
		
		for(int j = 0; j <= 48; j += 16) {
			Arrays.fill(cnt, 0);
			for(long x : xs) { cnt[(int)(x>>j&0xFFFF)+1]++; }
			for(int i = 1; i < cnt.length; i++) { cnt[i] += cnt[i-1]; }
			for(long x : xs) { ys[cnt[(int)(x>>j&0xFFFF)]++] = x; }
			{ final long[] t = xs; xs = ys; ys = t; }
		}
	}
	

	static void arrayIntSort(int[][] x, int... keys) {
		Arrays.sort(x, new ArrayIntsComparator(keys));
	}
	
	static class ArrayIntsComparator implements Comparator<int[]> {
		final int[] KEY;
		
		public ArrayIntsComparator(int... key) {
			KEY = key;
		}
		
		@Override
		public int compare(int[] o1, int[] o2) {
			for(int k : KEY) if(o1[k] != o2[k]) return o1[k] - o2[k];
			return 0;
		}
	}
	
	static class ArrayIntComparator implements Comparator<int[]> {
		final int KEY;
		
		public ArrayIntComparator(int key) {
			KEY = key;
		}
		
		@Override
		public int compare(int[] o1, int[] o2) {
			return o1[KEY] - o2[KEY];
		}
	}
	
	
	void main() throws IOException {
		//		IOFast.setFileIO("rle-size.in", "rle-size.out");
		try {
			run();
		}
		catch (EndOfFileRuntimeException e) { }
		io.out.flush();
	}

	public static void main(String[] args) throws IOException {
		new C().main();
	}
	
	static class EndOfFileRuntimeException extends RuntimeException {
		private static final long serialVersionUID = -8565341110209207657L; }

	static
	public class IOFast {
		private BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		private PrintWriter out = new PrintWriter(System.out);

		void setFileIO(String ins, String outs) throws IOException {
			out.flush();
			out.close();
			in.close();
			in = new BufferedReader(new FileReader(ins));
			out = new PrintWriter(new FileWriter(outs));
			System.err.println("reading from " + ins);
		}

		//		private static final int BUFFER_SIZE = 50 * 200000;
		private static int pos, readLen;
		private static final char[] buffer = new char[1024 * 8];
		private static char[] str = new char[500*8*2];
		private static boolean[] isDigit = new boolean[256];
		private static boolean[] isSpace = new boolean[256];
		private static boolean[] isLineSep = new boolean[256];

		static {
			for(int i = 0; i < 10; i++) { isDigit['0' + i] = true; }
			isDigit['-'] = true;
			isSpace[' '] = isSpace['\r'] = isSpace['\n'] = isSpace['\t'] = true;
			isLineSep['\r'] = isLineSep['\n'] = true;
		}

		public int read() throws IOException {
			if(pos >= readLen) {
				pos = 0;
				readLen = in.read(buffer);
				if(readLen <= 0) { throw new EndOfFileRuntimeException(); }
			}
			return buffer[pos++];
		}

		public int nextInt() throws IOException {
			return Integer.parseInt(nextString());
		}

		public long nextLong() throws IOException {
			return Long.parseLong(nextString());
		}

		public char nextChar() throws IOException {
			while(true) {
				final int c = read();
				if(!isSpace[c]) { return (char)c; }
			}
		}
		
		int reads(int len, boolean[] accept) throws IOException {
			try {
				while(true) {
					final int c = read();
					if(accept[c]) { break; }
					
					if(str.length == len) {
						char[] rep = new char[str.length * 3 / 2];
						System.arraycopy(str, 0, rep, 0, str.length);
						str = rep;
					}
					
					str[len++] = (char)c;
				}
			}
			catch(EndOfFileRuntimeException e) { ; }
			
			return len;
		}
		
		int reads(char[] cs, int len, boolean[] accept) throws IOException {
			try {
				while(true) {
					final int c = read();
					if(accept[c]) { break; }
					cs[len++] = (char)c;
				}
			}
			catch(EndOfFileRuntimeException e) { ; }
			
			return len;
		}

		public char[] nextLine() throws IOException {
			int len = 0;
			str[len++] = nextChar();
			len = reads(len, isLineSep);
			
			try {
				if(str[len-1] == '\r') { len--; read(); }
			}
			catch(EndOfFileRuntimeException e) { ; }
			
			return Arrays.copyOf(str, len);
		}

		public String nextString() throws IOException {
			return new String(next());
		}

		public char[] next() throws IOException {
			int len = 0;
			str[len++] = nextChar();
			len = reads(len, isSpace);
			return Arrays.copyOf(str, len);
		}

		public int next(char[] cs) throws IOException {
			int len = 0;
			cs[len++] = nextChar();
			len = reads(cs, len, isSpace);
			return len;
		}

		public double nextDouble() throws IOException {
			return Double.parseDouble(nextString());
		}

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

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

		public int[][] nextIntArray2D(final int n, final int k) throws IOException {
			final int[][] res = new int[n][];
			for(int i = 0; i < n; i++) {
				res[i] = nextIntArray(k);
			}
			return res;
		}

		public int[][] nextIntArray2DWithIndex(final int n, final int k) throws IOException {
			final int[][] res = new int[n][k+1];
			for(int i = 0; i < n; i++) {
				for(int j = 0; j < k; j++) {
					res[i][j] = nextInt();
				}
				res[i][k] = i;
			}
			return res;
		}

		public double[] nextDoubleArray(final int n) throws IOException {
			final double[] res = new double[n];
			for(int i = 0; i < n; i++) {
				res[i] = nextDouble();
			}
			return res;
		}

	}

}
