#include <bits/stdc++.h>
using namespace std;
const int inf = INT_MAX;
int main() {
  int a[3];
  cin >> a[0] >> a[1] >> a[2];
  sort(a, a + 3);
  if (a[2] == a[0] + a[1]) return cout << "YES", 0;
  return cout << "NO", 0;
}
