import std.stdio;                                                                                                                                                                        void main() {                                                                                              int a, b;                                                                                          
void main() {
  int a, b;
  readf("%d %d\n", &a, &b);                                                                                  
  foreach (c; 1..4) {
    if ((a * b * c) % 2 == 1) {
      write("Yes");
      return;
    }
  }
  write("No);
}
