#include <bits/stdc++.h>
using namespace std;
vector<int> vi[200005];
vector<int>::iterator child;
int arr[200005];
int arr2[200005];
int main() {
  cin >> arr[0] >> arr[1] >> arr[2];
  sort(arr, arr + 3);
  if (arr[0] + arr[1] == arr[2]) {
    printf("YES\n");
  } else
    cout << "NO";
}
