#include <bits/stdc++.h>
int ma = 0x80000000;
int mi = 0x7fffffff;
const long long zfc = 0xffffffff;
const long long mod = 1e9 + 7;
using namespace std;
inline void input(long long &x) {
  x = 0;
  int f = 1;
  char ch = getchar();
  while (!isdigit(ch)) {
    if (ch == '-') f = -f;
    ch = getchar();
  }
  while (isdigit(ch)) {
    x = x * 10 + (ch - '0');
    ch = getchar();
  }
  x *= f;
}
inline void output(long long x) {
  if (x < 0) {
    x = -x;
    putchar('-');
  }
  if (x / 10 > 0) output(x / 10);
  putchar(x % 10 + '0');
}
long long a, b, c;
int main() {
  cin >> (a);
  ;
  cin >> (b);
  ;
  (c);
  if (a + b == c || a + c == b || b + c == a)
    cout << "Yes";
  else
    cout << "No";
  cout << endl;
  ;
  return 0;
}
