'use strict';

const main = (input) => {
    const t = input.split(' ');
    const A = parseInt(t[0], 10);
    const B = parseInt(t[1], 10);
    console.log (((A % 2) == 0 || (B % 2) == 0) ? 'No' : 'Yes');
};

const isTest = false;

if (isTest) {
    main('3 1');
} else {
    main(require('fs').readFileSync('/dev/stdin', 'utf8'));
}