#include <bits/stdc++.h>
int main() {
  int a, b, c, answer, max, sub;
  scanf("%d", &a);
  scanf("%d", &b);
  scanf("%d", &c);
  max = 0;
  if (max < a) {
    max = a;
  }
  if (max < b) {
    max = b;
  }
  if (max < c) {
    max = c;
  }
  if (max == (a + b + c) / 2) {
    printf("Yes");
  } else {
    printf("No");
  }
  return 0;
}
