#include <bits/stdc++.h>

using namespace std;
const int NMAX = 1e4 + 5;
short D[NMAX];

struct cmp{
    bool operator()(const short &a,const short &b){
        return D[a] < D[b];
    }
};


priority_queue < short ,vector < short > ,cmp > heap;
vector < short > G[NMAX];


int main()
{
    freopen ("cezar.in" , "r", stdin);
    freopen ("cezar.out" , "w", stdout);
    int n,x,y,k;
    scanf("%d %d", &n, &k);
    cout << "Hello \world!" << endl;
    return 0;
}