#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <algorithm>
#include <atcoder/all>
#include <bitset>
#include <cassert>
#include <cmath>
#include <ctime>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n) - 1; i >= 0; i--)
#define repk(i, k, n) for (int i = k; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define mod1 1000000007
#define mod2 998244353
#define mod3 100000007
#define vi vector<int>
#define vs vector<string>
#define vc vector<char>
#define vl vector<ll>
#define vb vector<bool>
#define vvi vector<vector<int>>
#define vvc vector<vector<char>>
#define vvl vector<vector<ll>>
#define vvb vector<vector<bool>>
#define vvvi vector<vector<vector<int>>>
#define vvvl vector<vector<vector<ll>>>
#define pii pair<int, int>
#define pil pair<int, ll>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define vpii vector<pair<int, int>>
#define vpll vector<pair<ll, ll>>
#define vvpii vector<vector<pair<int, int>>>
#define vvpll vector<vector<pair<ll, ll>>>

// using mint = modint998244353;

template <typename T>
void debug(T e) {
    cerr << e << endl;
}

template <typename T>
void debug(vector<T> &v) {
    rep(i, v.size()) { cerr << v[i] << " "; }
    cerr << endl;
}

template <typename T>
void debug(vector<vector<T>> &v) {
    rep(i, v.size()) {
        rep(j, v[i].size()) { cerr << v[i][j] << " "; }
        cerr << endl;
    }
}

template <typename T>
void debug(vector<pair<T, T>> &v) {
    rep(i, v.size()) { cerr << v[i].first << " " << v[i].second << endl; }
}

template <typename T>
void debug(set<T> &st) {
    for (auto itr = st.begin(); itr != st.end(); itr++) {
        cerr << *itr << " ";
    }
    cerr << endl;
}

template <typename T>
void debug(multiset<T> &ms) {
    for (auto itr = ms.begin(); itr != ms.end(); itr++) {
        cerr << *itr << " ";
    }
    cerr << endl;
}

template <typename T>
void debug(map<T, T> &mp) {
    for (auto itr = mp.begin(); itr != mp.end(); itr++) {
        cerr << itr->first << " " << itr->second << endl;
    }
}

void debug_out() { cerr << endl; }

template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << H << " ";
    debug_out(T...);
}

int main() {
    ll N, M, Q;
    cin >> N >> M >> Q;
    vector<ll> A(M);
    vector<ll> B(M);
    for (ll i = 0; i < M; i++) {
        cin >> A[i] >> B[i];
        A[i]--;
        B[i]--;
    }
    vector<ll> C(Q);
    vector<ll> D(Q);
    for (ll i = 0; i < Q; i++) {
        cin >> C[i] >> D[i];
        C[i]--;
        D[i]--;
    }
    set<pll> st;
    for (ll i = 0; i < Q; i++) {
        st.insert(make_pair(C[i], D[i]));
    }
    vector<bool> not_broken(M, false);
    for (ll i = 0; i < M; i++) {
        if (st.find(make_pair(A[i], B[i])) == st.end()) {
            not_broken[i] = true;
        }
    }
    vector<ll> now_ok(N, -1);
    vector<ll> now_ng(N, Q + 1);

    for (ll i = 0; i < 20; i++) {
        vector<vector<ll>> mid_idx(Q + 1, vector<ll>(0));
        for (ll j = 0; j < N; j++) {
            ll mid = (now_ng[j] + now_ok[j]) / 2;
            if (mid >= 0 && mid <= Q) {
                mid_idx[mid].push_back(j);
            }
        }
        dsu tree(N);
        for (ll j = 0; j < M; j++) {
            if (not_broken[j]) {
                tree.merge(A[j], B[j]);
            }
        }

        for (ll j = 0; j < mid_idx[Q].size(); j++) {
            if (tree.same(0, mid_idx[Q][j])) {
                now_ok[mid_idx[Q][j]] = Q;
            } else {
                now_ng[mid_idx[Q][j]] = Q;
            }
        }
        for (ll j = Q - 1; j >= 0; j--) {
            tree.merge(C[j], D[j]);
            for (ll k = 0; k < mid_idx[j].size(); k++) {
                if (tree.same(0, mid_idx[j][k])) {
                    now_ok[mid_idx[j][k]] = j;
                } else {
                    now_ng[mid_idx[j][k]] = j;
                }
            }
        }
        // debug(now_ok);
        // debug(now_ng);
    }
    for (ll i = 1; i < N; i++) {
        if (now_ng[i] == Q + 1) {
            cout << -1 << endl;
        } else {
            cout << now_ng[i] << endl;
        }
    }
}