#include <bits/stdc++.h>
using namespace std;
long long gcd(long long a, long long b) { return b ? gcd(b, a % b) : a; }
int main() {
  long long a, b, c;
  cin >> a >> b >> c;
  cout << (a + b == c || b + c == a || c + a == b ? "YES" : "NO") << endl;
  return 0;
}
