#include <bits/stdc++.h>

#define show(x) cerr << #x << " = " << x << endl

using namespace std;
using ll = long long;
template <typename T>
vector<T> Vec(int n, T v)
{
    return vector<T>(n, v);
}
template <class... Args>
auto Vec(int n, Args... args)
{
    auto val = Vec(args...);
    return vector<decltype(val)>(n, move(val));
}

template <typename Data, typename Checker>
void ParallelBinarySearch(const vector<Data>& queries, Checker& checker, const int inf, const int sup, vector<int>& ans)
{
    const int Q = queries.size();
    ans.resize(Q, -1);
    using Query = pair<Data, int>;
    struct Qset {
        int l;
        int r;
        vector<Query> query;
    };
    vector<Qset> data{Qset{inf, sup, vector<Query>(Q)}};
    for (int i = 0; i < Q; i++) {
        data[0].query[i] = make_pair(queries[i], i);
    }
    for (int d = 0;; d++) {
        if (data.empty()) {
            break;
        }
        vector<Qset> next;
        checker.initialize();
        int pos = 0;
        for (const auto& dat : data) {
            const int inf = dat.l;
            const int sup = dat.r;
            const int mid = (inf + sup) / 2;
            Qset former{inf, mid, vector<Query>{}};
            Qset latter{mid + 1, sup, vector<Query>{}};
            for (; pos < mid; pos++) {
                checker.update(pos);
            }
            if (inf >= sup - 1) {
                for (const auto& e : dat.query) {
                    if (checker.check(e.first)) {
                        ans[e.second] = inf;
                    } else if (inf == sup - 1) {
                        latter.query.push_back(e);
                    }
                }
            } else {
                for (const auto& e : dat.query) {
                    if (checker.check(e.first)) {
                        former.query.push_back(e);
                    } else {
                        latter.query.push_back(e);
                    }
                }
            }
            if (not former.query.empty()) {
                next.push_back(former);
            }
            if (not latter.query.empty()) {
                next.push_back(latter);
            }
        }
        data = next;
    }
}

class DisjointSets
{
public:
    DisjointSets(const int v)
    {
        m_parent.resize(v);
        m_rank.resize(v);
        m_size.resize(v);
        for (int i = 0; i < v; i++) {
            m_parent[i] = i;
            m_rank[i] = 0;
            m_size[i] = 1;
        }
    }

    bool same(const int a, const int b)
    {
        return find(a) == find(b);
    }


    int find(const int a)
    {
        if (m_parent[a] == a) {
            return a;
        } else {
            return m_parent[a] = find(m_parent[a]);
        }
    }

    void unite(const int a_, const int b_)
    {
        const int a = find(a_);
        const int b = find(b_);
        if (a == b) {
            return;
        }
        if (m_rank[a] > m_rank[b]) {
            m_parent[b] = a;
            m_size[a] += m_size[b];
        } else {
            m_parent[a] = b;
            m_size[b] += m_size[a];
        }
        if (m_rank[a] == m_rank[b]) {
            m_rank[b]++;
        }
    }

    int getSize(const int a)
    {
        return m_size[m_parent[a]];
    }

private:
    vector<int> m_parent;
    vector<int> m_rank;
    vector<int> m_size;
};

int N;
using P = pair<int, int>;
vector<P> edge;
using Data = int;

// Checker::initialize() => void
// Checker::update(int pos) => void
// Checker::check(const Data&) => bool
struct Checker {
    Checker(const DisjointSets& org) : orig{org}, uf{N} {}

    void initialize()
    {
        uf = orig;
    }
    void update(const int pos)
    {
        const int u = edge[pos].first;
        const int v = edge[pos].second;
        uf.unite(u, v);
    }
    bool check(const Data& d)
    {
        return uf.same(0, d);
    }

    DisjointSets orig;
    DisjointSets uf;
};

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    cin >> N;
    int M, Q;
    cin >> M >> Q;
    set<P> orig;
    for (int i = 0; i < M; i++) {
        int a, b;
        cin >> a >> b;
        a--, b--;
        if (a > b) {
            swap(a, b);
        }
        orig.insert({a, b});
    }
    for (int i = 0; i < Q; i++) {
        int c, d;
        cin >> c >> d;
        c--, d--;
        if (c > d) {
            swap(c, d);
        }
        edge.push_back({c, d});
        orig.erase({c, d});
    }

    DisjointSets uf(N);
    for (const auto& e : orig) {
        uf.unite(e.first, e.second);
    }
    reverse(edge.begin(), edge.end());
    Checker checker(uf);
    vector<int> ans;
    vector<Data> queries(N - 1);
    for (int i = 1; i < N; i++) {
        queries[i - 1] = i;
    }
    ParallelBinarySearch(queries, checker, 0, N, ans);
    for (int i = 0; i < N - 1; i++) {
        cout << (ans[i] <= 0 ? -1 : Q + 1 - ans[i]) << endl;
    }

    return 0;
}