#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;

using ll=long long;
using vi=vector<int>;
using vvi=vector<vi>;
using vs=vector<string>;

#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

const double PI=3.141592653589793;


int main(){
  cout<<"Hello World!"<<endl;
}