#include <bits/stdc++.h>
using namespace std;
static const double EPS = 1e-8;
static const double PI = 4.0 * atan(1.0);
static const double PI2 = 8.0 * atan(1.0);
int main(int argc, char **argv) {
  int a, b, c;
  cin >> a >> b >> c;
  cout << (a + b == c || a + c == b || a == b + c ? "YES" : "NO") << endl;
  return 0;
}
