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