#include <bits/stdc++.h>
using namespace std;
const long long INF = 1000000000000000000ll;
const long long MOD = 1000000007ll;
const double EPS = 1e-8;
int main() {
  long long a, b, c;
  cin >> a >> b >> c;
  if ((a + b == c) || (a + c == b) || (b + c == a)) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}
