#include <iostream>
using namespace std;
long long n,m;
int main () {
//	freopen("dist.in", "r", stdin);
//	freopen("dist.out", "w", stdout);
	cin>>n>>m;
	if(n>=0&&n<m||n<0&&0-m>n){
		cout<<"No";
		return 0;
	}
	if(n>=0){
		m-=n;
	}
	if(n<0){
		m+=n;
	}
	if(m%2==0){
		cout<<"Yes";
	}
	else{
		cout<<"No";
	}
    return 0;
}