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