#include <bits/stdc++.h>
int big(int a, int b) {
  if (a > b)
    return a;
  else
    return b;
}
int main() {
  int a, b, c;
  scanf("%d %d %d", &a, &b, &c);
  if (a == b || b == c || c == a) {
    printf("Yes\n");
    return 0;
  }
  if (2 * big(a, big(b, c)) == a + b + c) {
    printf("Yes\n");
    return 0;
  } else {
    printf("No\n");
    return 0;
  }
}
