#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b == c || a + c == b || b + c == a)
    cout << "YES\n";
  else
    cout << "NO\n";
}
