#include"testlib.h"

using ll = long long;
const ll Nmin = 2;
const ll Nmax = 400'000;
const ll Qmin = 1;
const ll Qmax = 400'000;

int main(){
    registerValidation();
    ll N = inf.readLong(Nmin, Nmax);
    inf.readSpace();
    ll Q = inf.readLong(Qmin, Qmax);
    inf.readEoln();
    std::vector<ll> P(Q);
    for (ll i = 1; i <= Q; i++){
        P[i-1] = inf.readLong(1LL, Q);
        inf.readSpace();
        ll X = inf.readLong(1LL, N);
        inf.readSpace();
        ll Y = inf.readLong(1LL, N);
        inf.readEoln();
        inf.ensuref(X < Y, "X < Y");
    }
    inf.readEof();
    std::sort(P.begin(), P.end());
    for (ll i = 0; i < Q; i++){
        inf.ensuref(P[i] == i+1, "P is permutation");
    }
}