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
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 3
0
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 4
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 3
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3
3


//package practice;
import java.util.*;
import java.io.*;


public class Practice {
    

    static int[] p;
    static int[] len;
    static ArrayList<Integer>[] list;
    static int at;
    static int mx;
    
    public static void main(String args[])
    { 
      InputReader in=new InputReader(System.in);
      int n=in.nextInt();
      int m=in.nextInt();
      int q=in.nextInt();
      p=new int[n];
      len=new int[n];
      list=new ArrayList[n];
      for(int i=0;i<n;i++)
      {
          p[i]=i;
          list[i]=new ArrayList<>();
      }
      while(m-->0)
      {
          int p1=in.nextInt()-1;
          int p2=in.nextInt()-1;
          list[p2].add(p1);
          list[p1].add(p2);
                  
          p[find(p1)]=find(p2);      
      }
      
      for(int i=0;i<n;i++)
      {
          if(p[i]==i)
          {
              len[i]=longest(i);
          } 
             
      }
      while(q-->0)
      {
          int ty=in.nextInt();
          if(ty==1)
          {
              int te=in.nextInt();
              System.out.println(len[find(te-1)]);
          }
          else
          {
              int e1=find(in.nextInt()-1);
              int e2=find(in.nextInt()-1);
              if(e1==e2)
                  continue;
              len[e2]=Math.max(Math.max(len[e1],len[e2]),(len[e1]+1)/2+(len[e2]+1)/2+1);
              p[e1]=e1;
              
              
          }
      }
      
      
    }
    public static int find(int po)
    {
        if(p[po]==po)
            return po;
        return p[po]=find(p[po]);
    }
    public static int longest(int u)
    {
        at=0;
        mx=-1;
        dfs(-1,0,u);
        dfs(-1,0,at);
        return mx;
    }
    public static void dfs(int p,int cost, int u)
    {
        if(cost>mx)
        {
            mx=cost;
            at=u;
        }
        for(int w:list[u])
        {
            if(w!=p)
            dfs(u,cost+1,w);
        }
        
    }
      
    
    
    
    
 static class InputReader {
        private InputStream stream;
        private byte[] buf = new byte[1024];
        private int curChar;
        private int numChars;
 
        public InputReader(InputStream stream) {
            this.stream = stream;
        }
 
        public 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++];
        }
 
        public 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 & 15;
 
                c = read();
            } while (!isSpaceChar(c));
 
            return res * sgn;
        }
 
        public int[] nextIntArray(int arraySize) {
            int array[] = new int[arraySize];
 
            for (int i = 0; i < arraySize; i++)
                array[i] = nextInt();
 
            return array;
        }
 
        public long nextLong() {
            int c = read();
 
            while (isSpaceChar(c))
                c = read();
 
            int sign = 1;
 
            if (c == '-') {
                sign = -1;
 
                c = read();
            }
 
            long result = 0;
 
            do {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
 
                result *= 10;
                result += c & 15;
 
                c = read();
            } while (!isSpaceChar(c));
 
            return result * sign;
        }
 
        public long[] nextLongArray(int arraySize) {
            long array[] = new long[arraySize];
 
            for (int i = 0; i < arraySize; i++)
                array[i] = nextLong();
 
            return array;
        }
 
        public float nextFloat() // problematic
        {
            float result, div;
            byte c;
 
            result = 0;
            div = 1;
            c = (byte) read();
 
            while (c <= ' ')
                c = (byte) read();
 
            boolean isNegative = (c == '-');
 
            if (isNegative)
                c = (byte) read();
 
            do {
                result = result * 10 + c - '0';
            } while ((c = (byte) read()) >= '0' && c <= '9');
 
            if (c == '.')
                while ((c = (byte) read()) >= '0' && c <= '9')
                    result += (c - '0') / (div *= 10);
 
            if (isNegative)
                return -result;
 
            return result;
        }
 
        public double nextDouble() // not completely accurate
        {
            double ret = 0, div = 1;
            byte c = (byte) read();
 
            while (c <= ' ')
                c = (byte) read();
 
            boolean neg = (c == '-');
 
            if (neg)
                c = (byte) read();
 
            do {
                ret = ret * 10 + c - '0';
            } while ((c = (byte) read()) >= '0' && c <= '9');
 
            if (c == '.')
                while ((c = (byte) read()) >= '0' && c <= '9')
                    ret += (c - '0') / (div *= 10);
 
            if (neg)
                return -ret;
 
            return ret;
        }
 
        public String next() {
            int c = read();
 
            while (isSpaceChar(c))
                c = read();
 
            StringBuilder res = new StringBuilder();
 
            do {
                res.appendCodePoint(c);
 
                c = read();
            } while (!isSpaceChar(c));
 
            return res.toString();
        }
 
        public boolean isSpaceChar(int c) {
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }
 
        public String nextLine() {
            int c = read();
 
            StringBuilder result = new StringBuilder();
 
            do {
                result.appendCodePoint(c);
 
                c = read();
            } while (!isNewLine(c));
 
            return result.toString();
        }
 
        public boolean isNewLine(int c) {
            return c == '\n';
        }
 
        public void close() {
            try {
                stream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
 
    }
    
}

