#include <bits/stdc++.h>
//#include <atcoder/all>
 
#define elif else if
#define ll long long
#define vll vector<long long>
#define vec vector
#define embk emplace_back
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep3(i, n, k) for (int i = k; i < (int)(n); i++)
#define all(a) a.begin(), a.end()
 
using namespace std;
//using namespace atcoder;
const ll INF = 1LL << 60;
const ll mod = 998244353;
 
int main() {
  ll n; cin >> n;
  cout << "Hello World!" <<endl;
  
}