Method upd

Data Structures/Segment Tree NonRecursive.cpp:30–33

  }

  void upd(int p, int v) {
    p--;
    for (t[p += n] = Node(v); p >>= 1; ) t[p] = combine(t[p << 1], t[p << 1 | 1]);
  }

  Node query(int l, int r) {
    --l;