const input = require('fs').readFileSync('/dev/stdin'. 'utf8');

const list = input.split(' ');

const a = Number(list[0]);

const b = Number(list[1]);

const output = () => {
  if (a === 2 || b === 2) {
    console.log('No');
    return;
  } else {
    console.log('Yes');
    return;
  }
};

output();