#include <bits/stdc++.h>
using namespace std;
#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
const long long N = 1e3 + 10;
const long long MOD = 1e9 + 7;
int32_t main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  ;
  long long a[3];
  for (long long i = 0; i < 3; ++i) {
    cin >> a[i];
  }
  sort(a, a + 3);
  cout << ((a[0] + a[1] != a[2]) ? "NO" : "YES");
  return 0;
}
