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