'use strict';

function Main(inputs) {
    const input = inputs.split(" ");
    const a = input[0];
    const b = input[1];
    let output = 'No';

    for (let c = 1; c <= 3; c++) {
        if ((a*b*c) % 2 == 1) {
            output = 'Yes';
            break;
        }
    }
    console.log(output);
}

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