#include <bits/stdc++.h> using namespace std; int main(){ int ji=0,tu=0,a,b; cin >> a >> b; tu+=(b-a2)/2; ji+=a-tu; if(ji<0 || tu<0){ cout << "No"; return 0; } if(ji2+tu*4==b ){ cout << "Yes"; }else{ cout << "No" ; } return 0; }

#include <bits/stdc++.h> using namespace std; typedef long long ll; ll j,t; ll x,y; int main() { cin>>x>>y; t=(y-2x)/2; j=x-t; if(t<0 or j<0){ cout<<"No"; return 0; } if(j2+t*4==y) cout<<"Yes"; else cout<<"No"; return 0; }