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