'use strict';

function Main(input) {
  const A = Number(input.split('\n')[0].split(' ')[0]);
  const B = Number(input.split('\n')[0].split(' ')[1]);

  if((A * B) % 2 === 0) {
    console.log('No');
  } else {
    console.log('Yes');
  }

};

Main(require("fs").readFileSync("/dev/stdin", "utf8").trim());
