#include <bits/stdc++.h>
using namespace std;
long double pi = acos(-1);
const int INF = 1001001001;
int euqlid(int a, int b) {
  int temp;
  temp = a % b;
  if (temp == 0) return b;
  return euqlid(b, temp);
}
long long conbination(long long a, long long b) {
  long long u = 1;
  long long d = 1;
  while (b != 0) {
    u *= a;
    d *= b;
    a--;
    b--;
  }
  return u / d;
}
int strtoint(char s) { return (int(s - '0')); }
char changeS(char alpha) {
  if (0x41 <= alpha and alpha <= 0x5A)
    return (alpha + 0x20);
  else if (0x61 <= alpha and alpha <= 0x7A)
    return (alpha - 0x20);
  return alpha;
}
int fact(int n) {
  if (n == 1) return 1;
  return n * fact(n - 1);
}
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  cout << (a + b + c - max(a, max(b, c)) == 0 ? "Yes" : "No") << endl;
}
