#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;


int main(){
  ll X, Y, Z;
  cin >> X >> Y >> Z;

  X += 100;
  Y += 100;
  Z += 100;

  if(X == Y && Y == Z){
    cout << "Yes" << endl;
    return 0;
  }

  if((X+Y+Z)%3 == 0){
    cout << "Yes" << endl;
  }else{
    cout << "No" << endl;
  }
  
  return 0;
}