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