#include <iostream>
#include <fstream>
#include <vector>
#include <deque>
#include <stack>
#include <bitset>
#define MAX 250001
using namespace std;



//bitset <1>  viz[ 250002 ];

int main()
{
    int n,m,p,q,i = 1;


    // citesc cererile

    /*
    for(i = 0;i <= n ; i++){
        cout<<i<<" : ";
        for(int j = 0; j <cereri[i].size(); j++)
            cout<<cereri[i][j]<<" ";
        cout<<endl;
    }
    */

    return 0;
}