#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <class T>
inline bool chmin(T &a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
template <class T>
inline bool chmax(T &a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <class T>
inline T GCD(T a, T b) {
  if (b == 0)
    return a;
  else
    return GCD(b, a % b);
}
template <class T>
inline T LCM(T a, T b) {
  return (a * b) / GCD(a, b);
}
void ans(bool flag) {
  if (flag)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  bool flag = true;
  if (a + b == c) flag = false;
  if (b + c == a) flag = false;
  if (a + c == b) flag = false;
  if (flag)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
