#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const int INF=1e9;

int main() {
	cin.tie(nullptr),cout.tie(nullptr);
	ios::sync_with_stdio(false);
  
  int n;
  cin >> n;
  
  int a=n/100;
  int b=(n/10)%10;
  int c=(n%100)%10;
  if(a+c==b){
    cout << "Yes" << endl;
    return 0;
  }
  
  cout << "No" << endl;
}