function Main(input) {
    input = input.split('\n');
    var arr = input[0].split(' ').map(Number);
    var a = arr[0];
    var b = arr[1];

    if(a*b % 2 != 0) console.log('Yes');
    else console.log('No');
}

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