#include <bits/stdc++.h>
using namespace std;
int main() {
  int a;
  int b;
  int c;
  cin >> a;
  cin >> b;
  cin >> c;
  bool flag;
  if ((a + b) == c) {
    flag = true;
  }
  if ((b + c) == a) {
    flag = true;
  }
  if ((c + a) == b) {
    flag = true;
  }
  if (flag) {
    cout << "Yes";
  } else {
    cout << "No";
  }
  return 0;
}
