"use strict";
function Main(input) {
    let lines = input.split("\n");
    let cols = lines[0].split(/\s/).map((v) => v - 0);
    let A = cols[0], B = cols[1];
    const odd = (v) => v % 2 != 0;
    let ans = false;
    for (let c = 1; c <= 3 && !ans; c++) {
        ans = odd(A * B * c);
    }
    console.log(ans ? "Yes" : "No");
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
