#include <bits/stdc++.h>
using namespace std;
int main() {
  int A;
  int B;
  int C;
  cin >> A;
  cin >> B;
  cin >> C;
  if (A == B + C || B == A + C || C == A + B) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
}
