Method pull

Data Structures/Segment Tree 2D Dynamic.cpp:17–23

    val = g = value;
  }
  void pull() {
    g = val;
    if(l) g = __gcd(g, l->g);
    if(r) g = __gcd(g, r->g);
    mn = (l ? l->mn : pos);
    mx = (r ? r->mx : pos);
  }
};
//memory O(n)
struct treap {