#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  t = 1;
  while (t--) {
    long long int a, b, c;
    cin >> a >> b >> c;
    if (a + b == c || a + c == b || b + c == a)
      cout << "YES\n";
    else
      cout << "NO\n";
  }
  return 0;
}
