function Main(input) {
  input = input.split('\n');
  input = input.map((n) => parseInt(n,10));
  input.pop();
  if(input[0] == 1) {
    console.log('Hello World');
  }else if(input[0] == 2) {
    var result = input[1] + input[2];
    console.log(result);
  }
}
Main(require('fs').readFileSync('/dev/stdin', 'utf8'));