function Main(input) {
  input = input.split("\n");
  var a = parseInt(input[0].split(" ")[0]);
  var b = parseInt(input[0].split(" ")[1]);
  var ans ="Yes";
  if(a%2==0||b%2==0){
    ans="No";
  }

  console.log('%s', ans);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));