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