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

#define ll long long
#define ld long double
#define ar array
#define vt vector
#define pb push_back
#define all(c) (c).begin(), (c).end()
#define sz(x) (int)(x).size()

#define F_OR(i, a, b, s) for (int i=(a); (s)>0?i<(b):i>(b); i+=(s))
#define F_OR1(e) F_OR(i, 0, e, 1)
#define F_OR2(i, e) F_OR(i, 0, e, 1)
#define F_OR3(i, b, e) F_OR(i, b, e, 1)
#define F_OR4(i, b, e, s) F_OR(i, b, e, s)
#define GET5(a, b, c, d, e, ...) e
#define F_ORC(...) GET5(__VA_ARGS__, F_OR4, F_OR3, F_OR2, F_OR1)
#define FOR(...) F_ORC(__VA_ARGS__)(__VA_ARGS__)

template<class T> bool umin(T& a, const T& b) { return b<a?a=b, 1:0; }
template<class T> bool umax(T& a, const T& b) { return a<b?a=b, 1:0; }

void solve() {
    cout << "Hello World!\n";
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    
    int tc = 1;
//    cin >> tc;  // Uncomment for multiple test cases
    for (int t = 1; t <= tc; t++) {
        // cout << "Case #" << t << ": ";  // Uncomment for Google contests
        solve();
    }
    
    return 0;
}