#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  int x = 0;
  int y = 0;
  int z = 0;
  cin >> a >> b >> c;
  x = a + b;
  y = b + c;
  z = c + a;
  if (x == y || y == z || z == x) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}
