#include<bits/stdc++.h>
//#include<boost/multiprecision/cpp_int.hpp>
//#include<atcoder/all>

using namespace std;
//using namespace boost::multiprecision;
//using namespace atcoder;

int main(){
    int A,B;
    cin>>A>>B;
    if(A==1&&B==1) cout<<"Yes"<<endl;
    else if(A==1) cout<<"No"<<endl;
    else if(B==1) cout<<"No"<<endl;
    else if(A==B) cout<<"Yes"<<endl;
    else if(A==2&&B%2==0) cout<<"Yes"<<endl;
    else if(A%2==0&&B==2) cout<<"Yes"<<endl;
    else cout<<"No"<<endl;
}

//2^3=8
//log28=3
//logA(B^A)=B