#include <cstdio>
#include <cstdint>
#include <cassert>
#include <vector>
#include <utility>
#include <algorithm>
#include <set>
#include <tuple>
#include <numeric>

class quick_find {
  std::vector<std::vector<size_t>> groups;
  std::vector<size_t> index;

public:
  quick_find(size_t n): index(n) {
    std::iota(index.begin(), index.end(), 0);
    for (size_t i = 0; i < n; ++i)
      groups.emplace_back(1, i);
  }

  bool unite(size_t u, size_t v) {
    if (index[u] == index[v]) return false;

    if (groups[index[u]].size() > groups[index[v]].size())
      std::swap(u, v);

    size_t pi = index[u];
    for (size_t i: groups[index[u]]) {
      index[i] = index[v];
      groups[index[v]].push_back(i);
    }
    groups[pi].clear();

    return true;
  }

  const std::vector<size_t>& components(size_t v) const {
    return groups[index[v]];
  }

  bool connected(size_t u, size_t v) const {
    return index[u] == index[v];
  }
};

int main() {
  size_t N, M, Q;
  scanf("%zu %zu %zu", &N, &M, &Q);

  using edge = std::pair<size_t, size_t>;

  std::vector<edge> ab(M);
  for (auto& p: ab) {
    scanf("%zu %zu", &p.first, &p.second);
    --p.first;
    --p.second;
  }

  std::vector<edge> cd(Q);
  std::set<edge> es;
  for (auto& p: cd) {
    scanf("%zu %zu", &p.first, &p.second);
    --p.first;
    --p.second;
    es.emplace(p.first, p.second);
  }

  quick_find qf(N);
  for (const auto& p: ab) {
    size_t a, b;
    std::tie(a, b) = p;
    if (es.count({a, b})) continue;
    qf.unite(a, b);
  }

  std::vector<int> res(N, 0);
  for (size_t u: qf.components(0))
    res[u] = -1;

  for (size_t i = Q; i--;) {
    size_t c, d;
    std::tie(c, d) = cd[i];

    if (!qf.unite(c, d)) continue;

    // TLE?
    const auto& cmp = qf.components(0);
    for (size_t u: cmp)
      if (res[u] == 0) res[u] = i+1;
  }

  res.erase(res.begin());
  for (auto ri: res) printf("%d\n", ri);
}