#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int  main()
{
	int n; cin >> n;
	int a,b;
	switch (n)
	{
		case 1:
			cout << "Hello World\n";
			break;
		case 2:
			cin >> a >> b; cout << a+b << endl;
			break;
	}
	return (0);
}

#include <bits/stdc++.h>
#define rep(i,n) for (int (i) = 0; (i) < (n); i++)
#define ll long long
using namespace std;
int main() {
  ll N = 0, A,B;;
  cin >> N >> A >> B;
  if(N == 1){
    cout << "Hello World";
  }
  else{
    cout << A + B;
  }
}
  