function Main(input){
var inputArray=input.split(" ");
var a=inputArray[0];
    b=inputArray[1];
    cArray=[1,2,3];
    
for (var c in cArray){
 var x= a*b*c
 if (x%2=== 1){
 console.log('Yes');
 }
}
console.log('No');
}

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