#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
using ll = long long;

int main(){
	int a , b , c;
	cin >> a >> b >> c;
	a += 100;
	b += 100;
	c += 100;
	if((a + b + c) % 3 > 0){
		cout << "No" << endl;
	}else{
		cout << "Yes" << endl;
	}
	
	return 0;
}