function main(arg) {
    arg = arg.split("\n")[0]
    arg = arg.split(" ")
    
    if ((arg[0]*arg[1]*1) % 2 === 1) {
        console.log("Yes")
        return
    }
    if ((arg[0]*arg[1]*2) % 2 === 1) {
        console.log("Yes")
        return
    }
    if ((arg[0]*arg[1]*3) % 3 === 1) {
        console.log("Yes")
        return
    }
    console.log("No")
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));