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

const int MIN_N = 1;
const int MAX_N = 200000;

const int MIN_M = 1;
const int MAX_M = 200000;

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

    const int n = inf.readInt(MIN_N, MAX_N, "N");
    inf.readSpace();
    const int m = inf.readInt(MIN_M, MAX_M, "M");
    inf.readEoln();

    for (int i = 0; i < m; ++i) {
        const int a = inf.readInt(-1, n);
        assert(a == -1 || (1 <= a && a <= n));
        if (i + 1 == m) {
            inf.readEoln();
        } else {
            inf.readSpace();
        }
    }

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