function Main(input) {
	args = input.split(" ");
    const n = parseInt(args[0], 10) * parseInt(args[1], 10);
    let result;
    for(i = 1; i <= 3; i++){
      	let nn = n * i;
        if( nn % 2 === 1 ){
            result = 'Yes';
            break;
        }
    }
    if( result === undefined ){
        result = 'No';
    }
    console.log('%s', result);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));