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