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