#include <bits/stdc++.h>
#define rep(i, n) for(int i= 0; i < (n); i++)
using ll= long long int;
using namespace std;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
ll mod= 1e9 + 7;



int main(){
  int g;
  cin >>g;
  int a,b;
  cin >>a >>b;
  if(g==1){cout << "Hello World" << endl;}else{cout << a+b << endl;}
}
#include <bits/stdc++.h>
using namespace std;

int main(void) {
    int n,a,b;
    cin >> n;
    if(n==2) {
        cin >> a >> b;
        cout << a + b << endl;
    } else {
        cout << "Hello World\n" << endl;
    }

    return 0;
}
