#include "testlib.h"
#include <iostream>
#include <cassert>
#include <set>

using namespace std;

const int MIN_N = 2;
const int MAX_N = 200000;

const int MIN_M = 0;
const int MAX_M = 200000;

const int MIN_Q = 1;
const int MAX_Q = 200000;

int main(int argc, char** argv) {
    registerValidation(argc, argv);

    const int n = inf.readInt(MIN_N, MAX_N, "N");
    inf.readSpace();

    const int max_m = min((long long)MAX_M, (long long)n * (n - 1) / 2);
    const int m = inf.readInt(MIN_M, max_m, "M");
    inf.readSpace();

    const int q = inf.readInt(MIN_Q, MAX_Q, "Q");
    inf.readEoln();

    set<pair<int, int>> edges;
    for (int i = 0; i < m; ++i) {
        const int u = inf.readInt(1, n);
        inf.readSpace();
        const int v = inf.readInt(1, n);
        inf.readEoln();
        assert(u != v);
        const int x = min(u, v);
        const int y = max(u, v);
        assert(edges.insert(make_pair(x, y)).second);
    }

    for (int i = 0; i < q; ++i) {
        const int u = inf.readInt(1, n);
        inf.readSpace();
        const int v = inf.readInt(1, n);
        inf.readEoln();
        assert(u != v);
    }

    inf.readEof();
    std::cout << "validator" << std::endl;
    return 0;
}