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