#include <bits/stdc++.h>

using LL = long long;

const int N = 1e5 + 7;
const int T = 1 << 18 | 7;

int n, m, q, c, max[T];
std::map<int, int> pos;
std::vector<int> tr[N], gr[N];
std::priority_queue<int> w[N];
int stk[N], *stp = stk, dfn[N], low[N], cnt, bel[N];
int dep[N], fa[N], sz[N], son[N];
int seq[N], top[N], tot;

void tarjan(int x, int y) {
  *++stp = x;
  dfn[x] = low[x] = ++cnt;
  for(int v: gr[x])
    if(v != y)
      if(!dfn[v]) {
	tarjan(v, x);
	low[x] = std::min(low[x], low[v]);
      }
      else
	low[x] = std::min(low[x], dfn[v]);
  if(low[x] == dfn[x]) {
    while(*stp != x) 
      bel[*stp--] = x;
    bel[*stp--] = x;
  }
}

void dfs(int x) {
  sz[x] = 1;
  for(int v: tr[x]) {
    fa[v] = x;
    dep[v] = dep[x] + 1;
    dfs(v);
    sz[x] += sz[v];
    if(sz[v] > sz[son[x]])
      son[x] = v;
  }
}

void dfs(int x, int y) {
  top[x] = y;
  seq[x] = ++tot;
  if(son[x])
    dfs(son[x], y);
  for(int v: tr[x])
    if(v != son[x])
      dfs(v, v);
}

void modify(int x, int y) {
  max[x += c] = y;
  while(x >>= 1)
    max[x] = std::max(max[x << 1], max[x << 1 | 1]);
}

int ask(int l, int r) {
  int ret = -1;
  for(l += c - 1, r += c + 1; l ^ r ^ 1; l >>= 1, r >>= 1) {
    if(~l & 1) ret = std::max(ret, max[l ^ 1]);
    if( r & 1) ret = std::max(ret, max[r ^ 1]);
  }
  return ret;
}

void mfy(int x, int y) {
  pos[y] = bel[x];
  w[bel[x]].push(y);
  modify(seq[bel[x]], w[bel[x]].top());
}

int qry(int x, int y) {
  x = bel[x];
  y = bel[y];
  int ret = -1;
  while(top[x] != top[y]) {
    if(dep[top[x]] < dep[top[y]])
      std::swap(x, y);
    ret = std::max(ret, ask(seq[top[x]], seq[x]));
    x = fa[top[x]];
  }
  if(dep[x] > dep[y])
    std::swap(x, y);
  ret = std::max(ret, ask(seq[x], seq[y]));
  if(ret != -1) {
    w[pos[ret]].pop();
    modify(seq[pos[ret]], w[pos[ret]].empty() ? -1 : w[pos[ret]].top());
  }
  return ret;
}
  
int main() {

  scanf("%d%d%d", &n, &m, &q);
  for(int i = 1, x, y; i <= m; ++i) {
    scanf("%d%d", &x, &y);
    gr[x].push_back(y);
    gr[y].push_back(x);
  }

  tarjan(1, 0);
  for(int i = 1; i <= n; ++i)
    for(int j: gr[i])
      if(bel[i] != bel[j] && dfn[i] < dfn[j])
	tr[bel[i]].push_back(bel[j]);

  dfs(1);
  dfs(1, 1);

  memset(max, -1, sizeof max);
  for(c = tot + 2; c & c - 1; c += c & -c) ;

  while(q--) {
    int t, x, y;
    scanf("%d%d%d", &t, &x, &y);
    if(t == 1)
      mfy(x, y);
    else
      printf("%d\n", qry(x, y));
  }
  
  return 0;

}