#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)

int main(){
    ll x,y,z;
    cin>>x>>y>>z;
    if((x+y+z)%3!=0)cout<<"No"<<endl;
    else{
        ll a=(x+y+z)/3;
        ll sa_x=a-x;
        ll sa_y=a-y;
        ll sa_z=a-z;
        //cout<<sa_x<<sa_y<<sa_z<<endl;
        if(sa_x+sa_y+sa_z==0)cout<<"Yes"<<endl;
        else cout<<"No"<<endl;
    }
    return 0;
}