简单暴力

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