/**
 * @file S2OJ/2104/val.cpp
 * @author Baoshuo <i@baoshuo.ren>
 * @url https://baoshuo.ren
 * @date 2023-03-30
 * @license GPL-3.0
 */

#include "testlib.h"

#include <limits>
#include <string>

int main() {
    registerValidation();

    int n = inf.readInt(1, 2e4, "n");
    inf.readSpace();
    int m = inf.readInt(1, 1e5, "m");
    inf.readEoln();

    for (int i = 1; i <= m; i++) {
        inf.readInt(1, n, "u");
        inf.readSpace();
        inf.readInt(1, n, "v");
        inf.readEoln();
    }

    inf.readEof();

    return 0;
}