#include"testlib.h"
#include<bits/stdc++.h>
using namespace std;
using ll = long long;

const ll Nmin = 0, Nmax = 10;
const ll ABmin = -10, ABmax = 10;
const ll Kmin = -100'000, Kmax = 100'000;

int main(){
    registerValidation();
    ll N = inf.readLong(Nmin, Nmax);
    inf.readSpace();
    ll A = inf.readLong(ABmin, ABmax);
    inf.readSpace();
    ll B = inf.readLong(ABmin, ABmax);
    inf.readEoln();
    inf.ensuref(A <= B, "A <= B");

    for (ll i = 0; i <= N; i++){
        ll K = inf.readLong(Kmin, Kmax);
        inf.readEoln();
    }

    inf.readEof();

    return 0;
}