"use strict";

function main(input) {
  input = input.split(" ").map(v => ~~v);

  const sum = input[0] * input[1];

  let ans = "No";
  ans = sum % 2 == 0 ? "No" : "Yes";

  console.log(ans);
}
main(require("fs").readFileSync("/dev/stdin", "utf8"));
