#include <bits/stdc++.h>
int main() {
  int a, b, c;
  scanf("%d %d %d", &a, &b, &c);
  int s[] = {a, b, c};
  int max = a;
  int others = 0;
  for (int i = 1; i < 3; i++) {
    if (max <= s[i]) {
      others += max;
      max = s[i];
    } else {
      others += s[i];
    }
  }
  if (max == others) {
    printf("YES");
  } else {
    printf("NO");
  }
  printf("\n");
  return 0;
}
