#include <bits/stdc++.h>
int main(void) {
  int a, b, c;
  scanf("%d %d %d", &a, &b, &c);
  if (1 > a, b, c || a, b, c > 100) {
    exit(0);
  }
  if (a + b == c || a + c == b || b + c == a) {
    printf("YES");
  } else {
    printf("NO");
  }
}
