不会的看我！！！

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll j,t;
ll x,y;
int main()
{
	cin>>x>>y;
	t=(y-2*x)/2;
	j=x-t;
    if(t<0 or j<0){
        cout<<"No";
        return 0;
    }
	if(j*2+t*4==y) cout<<"Yes";
	else cout<<"No";
	return 0;
}