Zkw线段树 -

The ZKW segment tree works by maintaining a balance between the value and lazy attributes of each node. When an update is made to a range, the lazy attribute of the corresponding node is updated. Then, when a query is made, the lazy attribute is propagated to the child nodes, and the value attribute is updated accordingly.

To update index p (0‑based) to value v : zkw线段树

今天，我们要介绍的是线段树的一种“非主流”但极其高效的实现方式——（又称非递归线段树、迭代式线段树）。它以其精简的代码、极小的常数和优美的循环结构，成为了无数选手追求极致性能的选择。 The ZKW segment tree works by maintaining a

// 若 l 是奇数(左孩子)，l^1 是右孩子，若往父节点跳，l^1 会被丢弃，所以先加上 if (~l & 1) sum += tree[l ^ 1]; when a query is made