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

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import java.util.*;
import java.io.*;
public class Main {
    static class Scan {
        private byte[] buf=new byte[1024];
        private int index;
        private InputStream in;
        private int total;
        public Scan()
        {
            in=System.in;
        }
        public int scan()throws IOException
        {
            if(total<0)
            throw new InputMismatchException();
            if(index>=total)
            {
                index=0;
                total=in.read(buf);
                if(total<=0)
                return -1;
            }
            return buf[index++];
        }
        public int scanInt()throws IOException
        {
            int integer=0;
            int n=scan();
            while(isWhiteSpace(n))
            n=scan();
            int neg=1;
            if(n=='-')
            {
                neg=-1;
                n=scan();
            }
            while(!isWhiteSpace(n))
            {
                if(n>='0'&&n<='9')
                {
                    integer*=10;
                    integer+=n-'0';
                    n=scan();
                }
                else throw new InputMismatchException();
            }
            return neg*integer;
        }
        public double scanDouble()throws IOException
        {
            double doub=0;
            int n=scan();
            while(isWhiteSpace(n))
            n=scan();
            int neg=1;
            if(n=='-')
            {
                neg=-1;
                n=scan();
            }
            while(!isWhiteSpace(n)&&n!='.')
            {
                if(n>='0'&&n<='9')
                {
                    doub*=10;
                    doub+=n-'0';
                    n=scan();
                }
                else throw new InputMismatchException();
            }
            if(n=='.')
            {
                n=scan();
                double temp=1;
                while(!isWhiteSpace(n))
                {
                    if(n>='0'&&n<='9')
                    {
                        temp/=10;
                        doub+=(n-'0')*temp;
                        n=scan();
                    }
                    else throw new InputMismatchException();
                }
            }
            return doub*neg;
        }
        public String scanString()throws IOException
        {
            StringBuilder sb=new StringBuilder();
            int n=scan();
            while(isWhiteSpace(n))
            n=scan();
            while(!isWhiteSpace(n))
            {
                sb.append((char)n);
                n=scan();
            }
            return sb.toString();
        }
        private boolean isWhiteSpace(int n)
        {
            if(n==' '||n=='\n'||n=='\r'||n=='\t'||n==-1)
            return true;
            return false;
        }
    }
    
    public static void sort(int arr[],int l,int r) {    //sort(arr,0,n-1);
        if(l==r) {
            return;
        }
        int mid=(l+r)/2;
        sort(arr,l,mid);
        sort(arr,mid+1,r);
        merge(arr,l,mid,mid+1,r);
    }
    public static void merge(int arr[],int l1,int r1,int l2,int r2) {
        int tmp[]=new int[r2-l1+1];
        int indx1=l1,indx2=l2;
        //sorting the two halves using a tmp array
        for(int i=0;i<tmp.length;i++) {
            if(indx1>r1) {
                tmp[i]=arr[indx2];
                indx2++;
                continue;
            }
            if(indx2>r2) {
                tmp[i]=arr[indx1];
                indx1++;
                continue;
            }
            if(arr[indx1]<arr[indx2]) {
                tmp[i]=arr[indx1];
                indx1++;
                continue;
            }
            tmp[i]=arr[indx2];
            indx2++;
        }
        //Copying the elements of tmp into the main array
        for(int i=0,j=l1;i<tmp.length;i++,j++) {
            arr[j]=tmp[i];
        }
    }
    
    public static void sort(long arr[],int l,int r) {    //sort(arr,0,n-1);
        if(l==r) {
            return;
        }
        int mid=(l+r)/2;
        sort(arr,l,mid);
        sort(arr,mid+1,r);
        merge(arr,l,mid,mid+1,r);
    }
    public static void merge(long arr[],int l1,int r1,int l2,int r2) {
        long tmp[]=new long[r2-l1+1];
        int indx1=l1,indx2=l2;
        //sorting the two halves using a tmp array
        for(int i=0;i<tmp.length;i++) {
            if(indx1>r1) {
                tmp[i]=arr[indx2];
                indx2++;
                continue;
            }
            if(indx2>r2) {
                tmp[i]=arr[indx1];
                indx1++;
                continue;
            }
            if(arr[indx1]<arr[indx2]) {
                tmp[i]=arr[indx1];
                indx1++;
                continue;
            }
            tmp[i]=arr[indx2];
            indx2++;
        }
        //Copying the elements of tmp into the main array
        for(int i=0,j=l1;i<tmp.length;i++,j++) {
            arr[j]=tmp[i];
        }
    }
    
    
    
    public static class DSU {
        int parent[],size[];
        DSU(int n){
            parent=new int[n];
            size=new int[n];
            make_set(n);
        }
        public void make_set(int n) {
            for(int i=0;i<n;i++) {
                parent[i] = i;
                size[i] = 1;
            }
        }

        public void union(int a, int b) {
            a = find(a);
            b = find(b);
            if (a != b) {
                if (size[a] < size[b])
                    swap(a, b);
                parent[b] = a;
                size[a] += size[b];
            }
        }
        public int find(int v) {
            if (v == parent[v]) {
                return v;
            }
            parent[v] = find(parent[v]);
            return parent[v];
        }
        public void swap(int i,int j) {
            int tmp=size[i];
            size[i]=size[j];
            size[j]=tmp;
        }
    }

    
    static int n,m;
    static ArrayList<Integer> adj_lst[];
    static DSU dsu;
    static boolean vis[];
    static int chain;
    public static void main(String args[]) throws IOException {
        Scan input=new Scan();
        StringBuilder ans=new StringBuilder("");
        int test=1;
        for(int tt=1;tt<=test;tt++) {
            n=input.scanInt();
            m=input.scanInt();
            int q=input.scanInt();
            adj_lst=new ArrayList[n];
            for(int i=0;i<n;i++) {
                adj_lst[i]=new ArrayList<>();
            }
            for(int i=0;i<m;i++) {
                int u=input.scanInt()-1;
                int v=input.scanInt()-1;
                adj_lst[u].add(v);
                adj_lst[v].add(u);
            }
            vis=new boolean[n];
            dsu=new DSU(n);
            int size[]=new int[n];
            for(int i=0;i<n;i++) {
                if(vis[i]) {
                    continue;
                }
                chain=0;
                DFS(i,-1);
                size[dsu.find(i)]=chain;
            }
            
//            System.out.println("ca");
            
            for(int i=0;i<q;i++) {
//                System.out.println(i);
                int type=input.scanInt();
                
                if(type==1) {
                    int x=input.scanInt()-1;
                    ans.append((size[dsu.find(x)]-1)+"\n");
                }
                else {
                    int x=input.scanInt()-1;
                    int y=input.scanInt()-1;
//                    System.out.println(i+" "+x+" "+y);
                    if(x==y) {
                        continue;
                    }
                    int s1=size[dsu.find(x)];
                    int s2=size[dsu.find(y)];
                    
                    int p[]=new int[4];
                    if(s1%2==0) {
                        p[0]=(s1/2)+1;
                        p[1]=(s1/2)-1;
                    }
                    else {
                        p[0]=(s1/2)+1;
                        p[1]=(s1/2);
                    }
                    
                    if(s2%2==0) {
                        p[2]=(s2/2)+1;
                        p[3]=(s2/2)-1;
                    }
                    else {
                        p[2]=(s2/2)+1;
                        p[3]=(s2/2);
                    }
                    
                    sort(p,0,p.length-1);
                    dsu.union(x, y);
                    size[dsu.find(x)]=p[3]+p[2];
                    
                }
            }
        }
        System.out.println(ans);
    }
    public static int DFS(int root,int par) {
        vis[root]=true;
        if(par!=-1) {
            dsu.union(root, par);
        }
        int max=1,sec_max=0;
        for(int i=0;i<adj_lst[root].size();i++) {
            if(adj_lst[root].get(i)==par) {
                continue;
            }
            int tmp=DFS(adj_lst[root].get(i),root);
            if(tmp>max) {
                sec_max=max;
                max=tmp;
            }
            else if(tmp>sec_max) {
                sec_max=tmp;
            }
        }
        chain=Math.max(chain, max+sec_max);
        return max;
        
    }
}
