#include <bits/stdc++.h>
using namespace std;
int ceil(int a, int b) { return (a + b - 1) / b; }
int round(int a, int b) { return (a + b / 2) / b; }
int gcd(int a, int b) { return b ? gcd(b, a % b) : a; }
int lcm(int a, int b) { return a * b / gcd(a, b); }
template <class T>
bool amax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <class T>
bool amin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return true;
  }
  return false;
}
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  int m = max({a, b, c});
  if (max({a, b, c}) == (a + b + c) / 2) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
  return 0;
}
