题解

#include <iostream>
using namespace std;
int main(){
    int x,y;
    cin>>x>>y;
    if(y%2==0){
        if(x*4>=y&x*2<=y){
            cout<<"Yes";
        }else{
            cout<<"No";
        }
    }else{
        cout<<"No";
    }
    return 0;          
}