#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;
}

#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; }

#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; }