#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

void bridgeDecomposition(
    const vector<vector<int> >& edges, vector<int>& indexConvert,
    vector<vector<int> >& nodesOut)
{
    const int n = edges.size();
    vector<int> num(n, -1), low(n, -1);
    vector<bool> isStk(n, false);
    stack<int> stk;
    int cnt = -1;
    nodesOut.clear();

    for(int i=0; i<n; ++i){
        stack<tuple<int, int, unsigned> > arg;
        arg.push(make_tuple(i, -1, 0));

        while(!arg.empty()){
            int v      = get<0>(arg.top());
            int prev   = get<1>(arg.top());
            unsigned j = get<2>(arg.top());
            arg.pop();

            if(j == 0){
                if(num[v] != -1)
                    continue;
                num[v] = low[v] = ++ cnt;
                stk.push(v);
                isStk[v] = true;
            }
            else{
                int w = edges[v][j-1];
                if(w != prev && isStk[w])
                    low[v] = min(low[v], low[w]);
            }

            if(j < edges[v].size()){
                arg.push(make_tuple(v, prev, j + 1));
                int w = edges[v][j];
                if(w != prev)
                    arg.push(make_tuple(w, v, 0));
            }
            else if(low[v] == num[v]){
                nodesOut.push_back(vector<int>());
                for(;;){
                    int w = stk.top();
                    stk.pop();
                    isStk[w] = false;
                    nodesOut.back().push_back(w);
                    if(v == w)
                        break;
                }
            }
        }
    }

    const int m = nodesOut.size();
    indexConvert.resize(n);
    for(int i=0; i<m; ++i){
        for(unsigned j=0; j<nodesOut[i].size(); ++j)
            indexConvert[nodesOut[i][j]] = i;
    }
}

void bridgeDecomposition(
    const vector<vector<int> >& edges, vector<int>& indexConvert,
    vector<vector<int> >& nodesOut, vector<vector<int> >& edgesOut)
{
    bridgeDecomposition(edges, indexConvert, nodesOut);

    const int n = edges.size();
    const int m = nodesOut.size();
    edgesOut.assign(m, vector<int>());
    vector<set<int> > used(m);
    for(int i=0; i<n; ++i){
        for(unsigned j=0; j<edges[i].size(); ++j){
            int v = indexConvert[i];
            int w = indexConvert[edges[i][j]];
            if(v != w && used[v].find(w) == used[v].end()){
                edgesOut[v].push_back(w);
                used[v].insert(w);
            }
        }
    }
}

class SegmentTree
{
public:
    typedef pair<int, int> T1;
    typedef pair<int, int> T2;

    // データの初期値、以下の条件を満たすこと
    //   uniteData(v, INIT_DATA) == v
    static const T1 INIT_DATA;
    
private:
    // 前回の値がprevである要素に対して、
    // パラメータxを用いた更新処理を適用した後の計算結果を返す
    T1 updateData(T1 prev, T2 x){
        if(x == INIT_DATA)
            return prev;
        else
            return x;
    }
    // 2つの区間の計算結果v1,v2に対して、
    // その2つの区間を統合した区間における計算結果を返す
    T1 uniteData(T1 v1, T1 v2){
        return max(v1, v2);
    }

    int n;
    vector<T1> data;
    void updateTree(int a, int k, int l, int r, T2 x){
        if(a == l && a == r){
            data[k] = updateData(data[k], x);
        }
        else if(l <= a && a <= r){
            updateTree(a, k*2+1, l, (l+r)/2, x);
            updateTree(a, k*2+2, (l+r+1)/2, r, x);
            data[k] = uniteData(data[k*2+1], data[k*2+2]);
        }
    }
    T1 getValue(int a, int b, int k, int l, int r){
        if(a <= l && r <= b){
            return data[k];
        }
        else if(a <= r && l <= b){
            T1 v1 = getValue(a, b, k*2+1, l, (l+r)/2);
            T1 v2 = getValue(a, b, k*2+2, (l+r+1)/2, r);
            return uniteData(v1, v2);
        }
        else{
            return INIT_DATA;
        }
    }

public:
    SegmentTree(int n0){
        n = 1;
        while(n < n0)
            n *= 2;
        data.assign(2*n-1, INIT_DATA);
    }
    SegmentTree(const vector<T1>& v) : SegmentTree((int)v.size()){
        for(unsigned i=0; i<v.size(); ++i)
            data[n-1+i] = v[i];
        for(int k=n-2; k>=0; --k)
            data[k] = uniteData(data[k*2+1], data[k*2+2]);
    }
    // a番目の要素にパラメータxによる更新処理を適用
    void update(int a, T2 x){
        updateTree(a, 0, 0, n-1, x);
    }
    // 区間[a,b]の計算結果を返す
    T1 get(int a, int b){
        return getValue(a, b, 0, 0, n-1);
    }
    T1 get(int a, int b, T1 leftPrev, T1 rightPrev){
        return uniteData(uniteData(leftPrev, get(a, b)), rightPrev);
    }
};
const SegmentTree::T1 SegmentTree::INIT_DATA(-1, -1);

class HeavyLightDecomposition
{
private:
    vector<SegmentTree> st;
    typedef SegmentTree::T1 T1;
    typedef SegmentTree::T2 T2;

    void addDataStructure(int n){
        st.push_back(SegmentTree(n));
    }
    void addDataStructure(const vector<T1>& init){
        st.push_back(SegmentTree(init));
    }
    void updateDataStructure(int i, int a, T2 x){
        st[i].update(a, x);
    }
    void updateDataStructure(int i, int a, int b, T2 x){
        st[i].update(a, x);
    }
    T1 getDataStructure(int i, int a, int b, T1 leftPrev, T1 rightPrev){
        return st[i].get(a, b, leftPrev, rightPrev);
    }
    T1 reverseData(T1 x){
        return x;
    }

    vector<int> depth;
    vector<int> parent;
    vector<vector<int> > node;
    vector<pair<int, int> > index;

    pair<int, int> dfs(const vector<vector<int> >& edges, int curr, int prev)
    {
        if(prev != -1){
            depth[curr] = depth[prev] + 1;
            parent[curr] = prev;
        }

        int sum = 1;
        pair<int, int> p(-1, -1);
        for(int next : edges[curr]){
            if(next == prev)
                continue;
            pair<int, int> p2 = dfs(edges, next, curr);
            sum += p2.first;
            p = max(p, p2);
        }

        if(p.first == -1){
            p.second = node.size();
            node.resize(p.second + 1);
        }
        node[p.second].push_back(curr);
        return make_pair(sum, p.second);
    }
public:
    HeavyLightDecomposition(const vector<vector<int> >& edges, int root)
    {
        int n = edges.size();
        depth.assign(n, 0);
        parent.assign(n, -1);
        dfs(edges, root, -1);
        index.resize(n);
        for(unsigned i=0; i<node.size(); ++i){
            for(unsigned j=0; j<node[i].size(); ++j)
                index[node[i][j]] = make_pair(i, j);
            addDataStructure(node[i].size());
        }
    }
    HeavyLightDecomposition(const vector<vector<int> >& edges, int root, const vector<T1>& init)
    {
        int n = edges.size();
        depth.assign(n, 0);
        parent.assign(n, -1);
        dfs(edges, root, -1);
        index.resize(n);
        for(unsigned i=0; i<node.size(); ++i){
            vector<T1> v(node[i].size());
            for(unsigned j=0; j<node[i].size(); ++j){
                index[node[i][j]] = make_pair(i, j);
                v[j] = init[node[i][j]];
            }
            addDataStructure(v);
        }
    }
    void update(int a, T2 x){
        updateDataStructure(index[a].first, index[a].second, x);
    }
    void update(int a, int b, T2 x){
        while(index[a].first != index[b].first){
            int a2 = node[index[a].first].back();
            int b2 = node[index[b].first].back();
            if(depth[a2] < depth[b2]){
                swap(a, b);
                swap(a2, b2);
            }
            updateDataStructure(index[a].first, index[a].second, index[a2].second, x);
            a = parent[a2];
        }
        if(depth[a] < depth[b])
            swap(a, b);
        updateDataStructure(index[a].first, index[a].second, index[b].second, x);
    }
    T1 get(int a, int b){
        T1 leftPrev  = SegmentTree::INIT_DATA;
        T1 rightPrev = SegmentTree::INIT_DATA;
        while(index[a].first != index[b].first){
            int a2 = node[index[a].first].back();
            int b2 = node[index[b].first].back();
            if(depth[a2] > depth[b2]){
                leftPrev = getDataStructure(index[a].first, index[a].second, index[a2].second, leftPrev, SegmentTree::INIT_DATA);
                a = parent[a2];
            }
            else{
                rightPrev = getDataStructure(index[b].first, index[b].second, index[b2].second, rightPrev, SegmentTree::INIT_DATA);
                b = parent[b2];
            }
        }
        if(depth[a] > depth[b]){
            return getDataStructure(index[a].first, index[a].second, index[b].second, leftPrev, reverseData(rightPrev));
        }
        else{
            T1 ans = getDataStructure(index[a].first, index[b].second, index[a].second, rightPrev, reverseData(leftPrev));
            return reverseData(ans);
        }
    }
};

int main()
{
    int n, m, q;
    cin >> n >> m >> q;

    vector<vector<int> > edges0(n);
    for(int i=0; i<m; ++i){
        int a, b;
        cin >> a >> b;
        -- a;
        -- b;
        edges0[a].push_back(b);
        edges0[b].push_back(a);
    }

    vector<int> indexConvert;
    vector<vector<int> > nodes;
    vector<vector<int> > edges;
    bridgeDecomposition(edges0, indexConvert, nodes, edges);

    vector<priority_queue<int> > pq(edges.size());
    HeavyLightDecomposition hl(edges, 0);
    while(--q >= 0){
        int type, a, b;
        cin >> type >> a >> b;

        if(type == 1){
            int i = indexConvert[a-1];
            if(pq[i].empty() || pq[i].top() < b)
                hl.update(i, make_pair(b, i));
            pq[i].push(b);
        }
        else{
            int i = indexConvert[a-1];
            int j = indexConvert[b-1];
            pair<int, int> p = hl.get(i, j);
            cout << p.first << endl;
            if(p.first != -1){
                int k = p.second;
                pq[k].pop();
                if(pq[k].empty())
                    hl.update(k, make_pair(-1, i));
                else
                    hl.update(k, make_pair(pq[k].top(), i));
            }
        }
    }

    return 0;
}