#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, q = 0;
  cin >> a >> b >> c;
  if (a + b == c) q = 1;
  if (b + c == a) q = 1;
  if (a + c == b) q = 1;
  if (q)
    cout << "YES";
  else
    cout << "NO";
}
