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
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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
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2 10 3
1 9
1 8
1 8
 10 5 10
1 2
1 3
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1 6
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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
3 9
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2 2 8
1 8
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2 10 3
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2 6 10
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2 6 2
2 2 5
2 3 9
1 3
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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
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2 3 10
1 3
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1 6
1 5
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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
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
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1 2
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2 5 1
1 2
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2 7 9
1 7
2 4 9
2 2 4
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2 3 8
1 9
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2 8 2
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1 10
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1 4
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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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2 10 7
1 8
1 9
2 1 4
2 1 1
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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
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1 2
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2 10 8
1 2
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 10 4 46
1 2
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2 10 8
1 1
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1 1
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1 8
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1 2
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1 2
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1 5
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1 5
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2 2 3
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2 8 9
1 8
1 3
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2 2 2
1 2
1 1
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1 3
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1 10
1 9
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2 8 9
1 4
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 10 7 26
1 2
2 3
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1 3
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2 9 4
2 5 1
1 5
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1 10
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2 1 4
1 6
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1 3
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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.util.*;

public class C implements Runnable{
	public static void main (String[] args) {new Thread(null, new C(), "_cf", 1 << 28).start();}

	public void run() {
		FastScanner fs = new FastScanner();
		PrintWriter out = new PrintWriter(System.out);
		System.err.println("Go!");

		int n = fs.nextInt(), m = fs.nextInt();
		int q = fs.nextInt();
		int[] deg = new int[n];
		int[][] edges = new int[m][2];
		for(int i = 0; i < m; i++) {
			int u = fs.nextInt() - 1;
			int v = fs.nextInt() - 1;
			edges[i][0] = u;
			edges[i][1] = v;
			deg[u]++; deg[v]++;
		}
		int[][] adj = new int[n][];
		for(int i = 0; i < n; i++) adj[i] = new int[deg[i]];
		for(int i = 0; i < m; i++) {
			int u = edges[i][0];
			int v = edges[i][1];
			adj[u][--deg[u]] = v;
			adj[v][--deg[v]] = u;
		}
		
		DSU ds = new DSU(n);
		boolean[] vis = new boolean[n];
		for(int i = 0; i < n; i++) {
			if(vis[i]) continue;
			int cent = findCenter(i, vis, adj);
			dfs(cent, -1, adj, ds);
		}
		while(q-->0) {
			int tp = fs.nextInt();
			if(tp == 1) {
				int u = fs.nextInt() - 1;
				out.println(ds.max[ds.find(u)]);
			}
			else {
				int u = fs.nextInt() - 1;
				int v = fs.nextInt() - 1;
				ds.union(u, v);
			}
		}
		
		out.close();
	}

	void dfs(int u, int p, int[][] adj, DSU ds) {
		for(int v : adj[u]) {
			if(v == p) continue;
			ds.par[v] = u;
			dfs(v, u, adj, ds);
			ds.max[u] = Math.max(ds.max[u], 1+ds.deep[v]+ds.deep[u]);
			ds.deep[u] = Math.max(ds.deep[u], 1 + ds.deep[v]);
			if(ds.rank[u] == ds.rank[v]) {
				ds.rank[u]++;
			} else {
				ds.rank[u] = Math.max(ds.rank[u], 1 + ds.rank[v]);
			}
		}
	}
	
	int findCenter(int start, boolean[] vis, int[][] adj) {
		int n = vis.length;
		ArrayDeque<Integer> leaf = new ArrayDeque<>(), bfs = new ArrayDeque<>();
		int[] dist = new int[n]; Arrays.fill(dist, 100100100);
		int[] deg = new int[n];
		dist[start] = 0;
		bfs.add(start);
		while(!bfs.isEmpty()) {
			int u = bfs.poll();
			vis[u] = true;
			int k = 0;
			deg[u] = adj[u].length;
			for(int v : adj[u]) {
				if(1 + dist[u] < dist[v]) {
					k++;
					dist[v] = dist[u]+1;
					bfs.add(v);
				}
			}
			if(k == 0) leaf.add(u);
		}
		int res = -1;
		while(!leaf.isEmpty()) {
			int u = leaf.pollFirst();
			res = u;
			deg[u]--;
			for(int v : adj[u]) {
				deg[v]--;
				if(deg[v] == 1) leaf.add(v);
			}
		}
		if(res == -1) throw new RuntimeException("No center???");
		return res;
	}
	
	class DSU {
		int n;
		int[] par, rank;
		int[] deep, max;
		DSU(int a) {
			n = a;
			par = new int[n];
			rank = new int[n];
			deep = new int[n];
			max = new int[n];
			for(int i = 0; i < n; i++) par[i] = i;
		}
		int find(int u) {
//			System.out.println(u + " " + par[u]);
			if(par[u] == u) return u;
			return par[u] = find(par[u]);
		}
		boolean union(int u, int v) {
			int pu = find(u);
			int pv = find(v);
			if(pu == pv) return false;
			if(rank[pu] >= rank[pv]) {
				if(rank[pu] == rank[pv]) rank[pu]++;
				max[pu] = Math.max(max[pu], deep[pu] + deep[pv] + 1);
				deep[pu] = Math.max(deep[pu], 1 + deep[pv]);
				par[pv] = pu;
			}
			else {
				max[pv] = Math.max(max[pv], deep[pu] + deep[pv] + 1);
				deep[pv] = Math.max(deep[pv], 1 + deep[pu]);
				par[pu] = pv;
			}
			return true;
		}
	}

	class FastScanner {
		public int BS = 1<<16;
		public char NC = (char)0;
		byte[] buf = new byte[BS];
		int bId = 0, size = 0;
		char c = NC;
		double num = 1;
		BufferedInputStream in;

		public FastScanner() {
			in = new BufferedInputStream(System.in, BS);
		}

		public FastScanner(String s) throws FileNotFoundException {
			in = new BufferedInputStream(new FileInputStream(new File(s)), BS);
		}

		public char nextChar(){
			while(bId==size) {
				try {
					size = in.read(buf);
				}catch(Exception e) {
					return NC;
				}                
				if(size==-1)return NC;
				bId=0;
			}
			return (char)buf[bId++];
		}

		public int nextInt() {
			return (int)nextLong();
		}

		public long nextLong() {
			num=1;
			boolean neg = false;
			if(c==NC)c=nextChar();
			for(;(c<'0' || c>'9'); c = nextChar()) {
				if(c=='-')neg=true;
			}
			long res = 0;
			for(; c>='0' && c <='9'; c=nextChar()) {
				res = (res<<3)+(res<<1)+c-'0';
				num*=10;
			}
			return neg?-res:res;
		}

		public double nextDouble() {
			double cur = nextLong();
			return c!='.' ? cur:cur+nextLong()/num;
		}

		public String next() {
			StringBuilder res = new StringBuilder();
			while(c<=32)c=nextChar();
			while(c>32) {
				res.append(c);
				c=nextChar();
			}
			return res.toString();
		}

		public String nextLine() {
			StringBuilder res = new StringBuilder();
			while(c<=32)c=nextChar();
			while(c!='\n') {
				res.append(c);
				c=nextChar();
			}
			return res.toString();
		}

		public boolean hasNext() {
			if(c>32)return true;
			while(true) {
				c=nextChar();
				if(c==NC)return false;
				else if(c>32)return true;
			}
		}

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

	}

}
