#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, d[256];
  cin >> a >> b >> c;
  d[0] = a;
  d[1] = b;
  d[2] = c;
  sort(d, d + 3);
  if (d[0] + d[1] == d[2]) {
    cout << "YES" << '\n';
  } else {
    cout << "NO" << '\n';
  }
  return 0;
}
