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



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


最简单的题解

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