#include <bits/stdc++.h>
int main() {
  int a, b, c, flag = 0;
  scanf("%d %d %d\n", &a, &b, &c);
  if (a == (b + c) || b == (a + c) || c == (b + a))
    flag = 1;
  else
    flag = 0;
  if (flag == 1)
    printf("YES\n");
  else
    printf("NO\n");
  return 0;
}
