#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  if (1 <= a && a <= 100 && 1 <= b && b <= 100 && 1 <= c && c <= 100) {
    if (a + b == c)
      cout << "YES";
    else if (a + c == b)
      cout << "YES";
    else if (b + c == a)
      cout << "YES";
    else
      cout << "NO";
  }
  return 0;
}
