function Main(input){
	var a = input.split("\n");
  if(a[0] == 1){
  	return "Hello World";
  }
  if(a[0] == 2){
  	return (a[1]*1) + (a[2]*1);
  }
}
 
console.log(Main(require("fs").readFileSync("/dev/stdin", "utf8")));