#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  if (a % 10 == 0 && b % 10 == 0) {
    if (a + b > c)
      cout << "Yes" << endl;
    else
      cout << "No" << endl;
  } else if (a + b == c)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}
