#include <bits/stdc++.h>
int main() {
  int a, b, c;
  if (a = b + c) {
    printf("Yes");
  } else if (b = a + c) {
    printf("Yes");
  } else if (c = a + b) {
    printf("Yes");
  } else {
    printf("No");
  }
  return 0;
}
