const main = input => {
  const [A, B] = input.trim().split(' ').map(x => parseInt(x))
  if (A % 2 === 0 || B % 2 === 0) {
    console.log('No')
  } else {
    console.log('Yes')
  }
}
// 標準入力
main(require("fs").readFileSync("/dev/stdin", "utf8"));
