Dynamic Tree Test (structure/develop/dynamic-tree-test.hpp)

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• Last update: 2024-05-01 23:44:47+09:00
• Include: #include "structure/develop/dynamic-tree-test.hpp"
• Link: https://dmoj.ca/problem/ds5

Depends on

• 何でもできるLCT (structure/develop/super-link-cut-tree.hpp)

Verified with

• test/verify/dmoj-ds5.hpp

Code

#include "super-link-cut-tree.hpp"

/**
 * @brief Dynamic Tree Test
 * @see https://dmoj.ca/problem/ds5
 */
using T = int;
const T inf_max = numeric_limits<T>::max();
const T inf_min = numeric_limits<T>::min();

// 遅延伝搬をする作用素
struct Lazy {
  int type;  // 0: none, 1: change, 2:inc
  T v;

  // 単位元
  Lazy() : type(0) {}

  // 初期化
  constexpr Lazy(int type, T v) : type(type), v(v) {}

  inline constexpr void propagate(const Lazy &p) {
    if (p.type == 0) {
      return;
    }
    if (type == 0 or p.type == 1) {
      type = p.type;
      v = p.v;
    } else {
      v += p.v;
    }
  }
};

// Light-edge の情報
template <typename Lazy>
struct LInfo {
  T min, max, sum, sz;

  T all_min, all_max, all_sum, all_sz;

  // 単位元(キーの値はアクセスしないので未初期化でもよい
  LInfo() : all_min(inf_max), all_max(inf_min), all_sum(0), all_sz(0) {}

  // 初期化
  LInfo(T min, T max, T sum, T sz) : min(min), max(max), sum(sum), sz(sz) {}

  // l, r は Splay-tree の子 (原理上、各ノード区別はない)
  void update(const LInfo &l, const LInfo &r) {
    all_min = std::min({l.all_min, min, r.all_min});
    all_max = std::max({l.all_max, max, r.all_max});
    all_sum = l.all_sum + sum + r.all_sum;
    all_sz = l.all_sz + sz + r.all_sz;
  }

  // light-edgeに対する遅延伝搬
  void propagate(const Lazy &p) {
    if (p.type == 0) {
      return;
    } else if (p.type == 1) {  // change
      min = p.v;
      max = p.v;
      sum = p.v * sz;
      all_min = p.v;
      all_max = p.v;
      all_sum = p.v * all_sz;
    } else {  // inc
      min += p.v;
      max += p.v;
      sum += p.v * sz;
      all_min += p.v;
      all_max += p.v;
      all_sum += p.v * all_sz;
    }
  }
};

// Heavy-edge の情報
template <typename LInfo, typename Lazy>
struct Info {
  T v;

  T path_min, path_max, path_sum, path_sz;
  T light_min, light_max, light_sum, light_sz;

  // 単位元(キーの値はアクセスしないので未初期化でもよい
  Info()
      : light_min(inf_max),
        light_max(inf_min),
        light_sum(0),
        light_sz(0),
        path_min(inf_max),
        path_max(inf_min),
        path_sum(0),
        path_sz(0) {}

  // 初期化
  Info(T v) : v(v) {}

  // 反転
  void toggle() {}

  // pが親, cがheavy-edgeで結ばれた子, lがそれ以外の子
  void update(const Info &p, const Info &c, const LInfo &l) {
    light_min = min({p.light_min, c.light_min, l.all_min});
    light_max = max({p.light_max, c.light_max, l.all_max});
    light_sum = p.light_sum + c.light_sum + l.all_sum;
    light_sz = p.light_sz + c.light_sz + l.all_sz;

    path_min = min({p.path_min, v, c.path_min});
    path_max = max({p.path_max, v, c.path_max});
    path_sum = p.path_sum + v + c.path_sum;
    path_sz = p.path_sz + 1 + c.path_sz;
  }

  // 親と light-edge で繋げる
  LInfo link() const {
    return LInfo(min(light_min, path_min), max(light_max, path_max),
                 path_sum + light_sum, light_sz + path_sz);
  }

  // 遅延伝搬
  void propagate(const Lazy &p) {
    if (p.type == 0) {
      return;
    } else if (p.type == 1) {  // change
      v = p.v;
      path_min = p.v;
      path_max = p.v;
      path_sum = p.v * path_sz;
    } else {  // inc
      v += p.v;
      path_min += p.v;
      path_max += p.v;
      path_sum += p.v * path_sz;
    }
  }

  // light-edgeに対する遅延伝搬
  // pathとsubtreeの遅延伝搬が両方ある場合に実装する
  void propagate_light(const Lazy &p) {
    if (p.type == 0 or light_min == inf_max) {
      return;
    } else if (p.type == 1) {  // change
      light_min = p.v;
      light_max = p.v;
      light_sum = p.v * light_sz;
    } else {  // inc
      light_min += p.v;
      light_max += p.v;
      light_sum += p.v * light_sz;
    }
  }
};

using LCT = SuperLinkCutTree<Info, LInfo, Lazy>;

#line 1 "structure/develop/super-link-cut-tree.hpp"
/**
 * @brief 何でもできるLCT
 */
template <typename LInfo, typename Lazy>
struct SplayTree {
  struct Node {
    Node *l, *r, *p;
    LInfo info;
    Lazy lazy, lbuf;

    explicit Node(const LInfo &info)
        : info(info),
          l(nullptr),
          r(nullptr),
          p(nullptr),
          lazy(Lazy()),
          lbuf(Lazy()) {}
  };

  const LInfo e;

  SplayTree() : e(LInfo()) {}

  using NP = Node *;

  void rotr(NP t) {
    NP x = t->p, y = x->p;
    push(x), push(t);
    if ((x->l = t->r)) t->r->p = x;
    t->r = x, x->p = t;
    update(x), update(t);
    if ((t->p = y)) {
      if (y->l == x) y->l = t;
      if (y->r == x) y->r = t;
    }
  }

  void rotl(NP t) {
    NP x = t->p, y = x->p;
    push(x), push(t);
    if ((x->r = t->l)) t->l->p = x;
    t->l = x, x->p = t;
    update(x), update(t);
    if ((t->p = y)) {
      if (y->l == x) y->l = t;
      if (y->r == x) y->r = t;
    }
  }

  const LInfo &get_info(NP t) { return t ? t->info : e; }

  void update(NP t) { t->info.update(get_info(t->l), get_info(t->r)); }

  NP get_right(NP t) {
    while (t->r) t = t->r;
    return t;
  }

  NP alloc(const LInfo &v) {
    auto t = new Node(v);
    update(t);
    return t;
  }

  void propagate(NP t, const Lazy &lazy) {
    t->info.propagate(lazy);
    t->lbuf.propagate(lazy);
    t->lazy.propagate(lazy);
  }

  void push(NP t) {
    if (t->l) propagate(t->l, t->lazy);
    if (t->r) propagate(t->r, t->lazy);
    t->lazy = Lazy();
  }

  void splay(NP t) {
    push(t);
    while (t->p) {
      NP q = t->p;
      if (!q->p) {
        if (q->l == t)
          rotr(t);
        else
          rotl(t);
      } else {
        NP r = q->p;
        if (r->l == q) {
          if (q->l == t)
            rotr(q), rotr(t);
          else
            rotl(t), rotr(t);
        } else {
          if (q->r == t)
            rotl(q), rotl(t);
          else
            rotr(t), rotl(t);
        }
      }
    }
  }

  NP insert(NP t, const LInfo &v) {
    if (not t) {
      t = alloc(v);
      return t;
    } else {
      NP cur = get_right(t), z = alloc(v);
      splay(cur);
      z->p = cur;
      cur->r = z;
      update(cur);
      splay(z);
      return z;
    }
  }

  NP erase(NP t) {
    splay(t);
    NP x = t->l, y = t->r;
    delete t;
    if (not x) {
      t = y;
      if (t) t->p = nullptr;
    } else if (not y) {
      t = x;
      t->p = nullptr;
    } else {
      x->p = nullptr;
      t = get_right(x);
      splay(t);
      t->r = y;
      y->p = t;
      update(t);
    }
    return t;
  }
};

template <template <typename, typename> typename _Info,
          template <typename> typename _LInfo, typename Lazy>
struct SuperLinkCutTree {
  using LInfo = _LInfo<Lazy>;
  using Info = _Info<LInfo, Lazy>;

 private:
  struct Node {
    Node *l, *r, *p;
    Info info;
    typename SplayTree<LInfo, Lazy>::Node *light, *belong;
    bool rev;
    Lazy hlazy, llazy;

    bool is_root() const { return not p or (p->l != this and p->r != this); }

    explicit Node(const Info &info)
        : info(info),
          l(nullptr),
          r(nullptr),
          p(nullptr),
          rev(false),
          light(nullptr),
          belong(nullptr),
          hlazy(Lazy()),
          llazy(Lazy()) {}
  };

 public:
  using NP = Node *;
  SplayTree<LInfo, Lazy> splay_tree;

 private:
  const Info e;

 private:
  void toggle(NP t) {
    swap(t->l, t->r);
    t->info.toggle();
    t->rev ^= true;
  }

  void rotr(NP t) {
    NP x = t->p, y = x->p;
    push(x), push(t);
    if ((x->l = t->r)) t->r->p = x;
    t->r = x, x->p = t;
    update(x), update(t);
    if ((t->p = y)) {
      if (y->l == x) y->l = t;
      if (y->r == x) y->r = t;
    }
  }

  void rotl(NP t) {
    NP x = t->p, y = x->p;
    push(x), push(t);
    if ((x->r = t->l)) t->l->p = x;
    t->l = x, x->p = t;
    update(x), update(t);
    if ((t->p = y)) {
      if (y->l == x) y->l = t;
      if (y->r == x) y->r = t;
    }
  }

  void propagate_heavy(NP t, const Lazy &hlazy) {
    t->hlazy.propagate(hlazy);
    t->info.propagate(hlazy);
  }

  void propagate_light(NP t, const Lazy &llazy) {
    t->llazy.propagate(llazy);
    t->info.propagate_light(llazy);
  }

  void propagate_all(NP t, const Lazy &lazy) {
    propagate_heavy(t, lazy);
    propagate_light(t, lazy);
  }

 public:
  SuperLinkCutTree() : e{Info()}, splay_tree{} {}

  void push(NP t) {
    if (t->rev) {
      if (t->l) toggle(t->l);
      if (t->r) toggle(t->r);
      t->rev = false;
    }
    {
      if (t->l) {
        propagate_heavy(t->l, t->hlazy);
        propagate_light(t->l, t->llazy);
      }
      if (t->r) {
        propagate_heavy(t->r, t->hlazy);
        propagate_light(t->r, t->llazy);
      }
      if (t->light) {
        splay_tree.propagate(t->light, t->llazy);
      }
      t->hlazy = Lazy();
      t->llazy = Lazy();
    }
  }

  void push_rev(NP t) {
    if (t->rev) {
      if (t->l) toggle(t->l);
      if (t->r) toggle(t->r);
      t->rev = false;
    }
  }

  const Info &get_info(NP t) { return t ? t->info : e; }

  void update(NP t) {
    t->info.update(get_info(t->l), get_info(t->r),
                   splay_tree.get_info(t->light));
  }

  void splay(NP t) {
    push(t);
    {
      NP rot = t;
      while (not rot->is_root()) rot = rot->p;
      t->belong = rot->belong;
      if (t != rot) rot->belong = nullptr;
    }
    while (not t->is_root()) {
      NP q = t->p;
      if (q->is_root()) {
        push_rev(q), push_rev(t);
        if (q->l == t)
          rotr(t);
        else
          rotl(t);
      } else {
        NP r = q->p;
        push_rev(r), push_rev(q), push_rev(t);
        if (r->l == q) {
          if (q->l == t)
            rotr(q), rotr(t);
          else
            rotl(t), rotr(t);
        } else {
          if (q->r == t)
            rotl(q), rotl(t);
          else
            rotr(t), rotl(t);
        }
      }
    }
  }

  NP expose(NP t) {
    NP rp = nullptr;
    for (NP cur = t; cur; cur = cur->p) {
      splay(cur);
      if (cur->r) {
        cur->light = splay_tree.insert(cur->light, cur->r->info.link());
        cur->r->belong = cur->light;
      }
      cur->r = rp;
      if (cur->r) {
        splay_tree.splay(cur->r->belong);
        propagate_all(cur->r, cur->r->belong->lbuf);
        push(cur->r);
        cur->light = splay_tree.erase(cur->r->belong);
      }
      update(cur);
      rp = cur;
    }
    splay(t);
    return rp;
  }

  void link(NP child, NP parent) {
    expose(parent);
    expose(child);
    child->p = parent;
    parent->r = child;
    update(parent);
  }

  void cut(NP child) {
    expose(child);
    NP parent = child->l;
    child->l = nullptr;
    parent->p = nullptr;
    update(child);
  }

  void evert(NP t) {
    expose(t);
    toggle(t);
    push(t);
  }

  NP alloc(const Info &info) {
    NP t = new Node(info);
    update(t);
    return t;
  }

  bool is_connected(NP u, NP v) {
    expose(u), expose(v);
    return u == v or u->p;
  }

  vector<NP> build(vector<Info> &vs) {
    vector<NP> nodes(vs.size());
    for (int i = 0; i < (int)vs.size(); i++) {
      nodes[i] = alloc(vs[i]);
    }
    return nodes;
  }

  NP lca(NP u, NP v) {
    if (not is_connected(u, v)) return nullptr;
    expose(u);
    return expose(v);
  }

  void set_key(NP t, const Info &v) {
    expose(t);
    t->info = move(v);
    update(t);
  }

  void set_propagate_path(NP t, const Lazy &lazy) {
    expose(t);
    propagate_heavy(t, lazy);
    push(t);
    update(t);
  }

  void set_propagate_path(NP u, NP v, const Lazy &lazy) {
    evert(u);
    set_propagate_path(v, lazy);
  }

  void set_propagate_all(NP t, const Lazy &lazy) {
    expose(t);
    propagate_all(t, lazy);
    push(t);
    update(t);
  }

  void set_propagate_subtree(NP t, const Lazy &lazy) {
    expose(t);
    NP l = t->l;
    t->l = nullptr;
    propagate_all(t, lazy);
    push(t);
    t->l = l;
    update(t);
  }

  const Info &query(NP u) {
    expose(u);
    return get_info(u);
  }

  const Info &query_path(NP u, NP v) {
    evert(u);
    expose(v);
    return get_info(v);
  }

  Info query_subtree(NP u) {
    expose(u);
    NP l = u->l;
    u->l = nullptr;
    update(u);
    auto ret = u->info;
    u->l = l;
    update(u);
    return ret;
  }
};

/*
using T = int64_t;
// 遅延伝搬をするための作用素
struct Lazy {

  // 単位元
  Lazy() {}

  // 初期化
  Lazy(T v) {}

  // 遅延伝搬
  void propagate(const Lazy &p) {}
};

// Light-edge の情報
template< typename Lazy >
struct LInfo {

  // 単位元(キーの値はアクセスしないので未初期化でもよい
  LInfo() {}

  // 初期化
  LInfo(T v) {}

  // l, r は Splay-tree の子 (原理上、各ノード区別はない)
  void update(const LInfo &l, const LInfo &r) {}

  // 部分木への遅延伝搬
  void propagate(const Lazy &p) {}
};

// Heavy-edge の情報
template< typename LInfo, typename Lazy >
struct Info {

  // 単位元(キーの値はアクセスしないので未初期化でもよい
  Info() {}

  // 初期化
  Info(T v) {}

  // 反転
  void toggle() {}

  // pが親, cがheavy-edgeで結ばれた子, lがそれ以外の子
  void update(const Info &p, const Info &c, const LInfo &l) {}

  // 親と light-edge で繋げる
  LInfo link() const { return LInfo(); }

  // 遅延伝搬
  void propagate(const Lazy &p) {}

  // light-edgeに対する遅延伝搬
  // pathとsubtreeの遅延伝搬が両方ある場合に実装する
  void propagate_light(const Lazy &p) {}
};

using LCT = SuperLinkCutTree< Info, LInfo, Lazy >;
*/
#line 2 "structure/develop/dynamic-tree-test.hpp"

/**
 * @brief Dynamic Tree Test
 * @see https://dmoj.ca/problem/ds5
 */
using T = int;
const T inf_max = numeric_limits<T>::max();
const T inf_min = numeric_limits<T>::min();

// 遅延伝搬をする作用素
struct Lazy {
  int type;  // 0: none, 1: change, 2:inc
  T v;

  // 単位元
  Lazy() : type(0) {}

  // 初期化
  constexpr Lazy(int type, T v) : type(type), v(v) {}

  inline constexpr void propagate(const Lazy &p) {
    if (p.type == 0) {
      return;
    }
    if (type == 0 or p.type == 1) {
      type = p.type;
      v = p.v;
    } else {
      v += p.v;
    }
  }
};

// Light-edge の情報
template <typename Lazy>
struct LInfo {
  T min, max, sum, sz;

  T all_min, all_max, all_sum, all_sz;

  // 単位元(キーの値はアクセスしないので未初期化でもよい
  LInfo() : all_min(inf_max), all_max(inf_min), all_sum(0), all_sz(0) {}

  // 初期化
  LInfo(T min, T max, T sum, T sz) : min(min), max(max), sum(sum), sz(sz) {}

  // l, r は Splay-tree の子 (原理上、各ノード区別はない)
  void update(const LInfo &l, const LInfo &r) {
    all_min = std::min({l.all_min, min, r.all_min});
    all_max = std::max({l.all_max, max, r.all_max});
    all_sum = l.all_sum + sum + r.all_sum;
    all_sz = l.all_sz + sz + r.all_sz;
  }

  // light-edgeに対する遅延伝搬
  void propagate(const Lazy &p) {
    if (p.type == 0) {
      return;
    } else if (p.type == 1) {  // change
      min = p.v;
      max = p.v;
      sum = p.v * sz;
      all_min = p.v;
      all_max = p.v;
      all_sum = p.v * all_sz;
    } else {  // inc
      min += p.v;
      max += p.v;
      sum += p.v * sz;
      all_min += p.v;
      all_max += p.v;
      all_sum += p.v * all_sz;
    }
  }
};

// Heavy-edge の情報
template <typename LInfo, typename Lazy>
struct Info {
  T v;

  T path_min, path_max, path_sum, path_sz;
  T light_min, light_max, light_sum, light_sz;

  // 単位元(キーの値はアクセスしないので未初期化でもよい
  Info()
      : light_min(inf_max),
        light_max(inf_min),
        light_sum(0),
        light_sz(0),
        path_min(inf_max),
        path_max(inf_min),
        path_sum(0),
        path_sz(0) {}

  // 初期化
  Info(T v) : v(v) {}

  // 反転
  void toggle() {}

  // pが親, cがheavy-edgeで結ばれた子, lがそれ以外の子
  void update(const Info &p, const Info &c, const LInfo &l) {
    light_min = min({p.light_min, c.light_min, l.all_min});
    light_max = max({p.light_max, c.light_max, l.all_max});
    light_sum = p.light_sum + c.light_sum + l.all_sum;
    light_sz = p.light_sz + c.light_sz + l.all_sz;

    path_min = min({p.path_min, v, c.path_min});
    path_max = max({p.path_max, v, c.path_max});
    path_sum = p.path_sum + v + c.path_sum;
    path_sz = p.path_sz + 1 + c.path_sz;
  }

  // 親と light-edge で繋げる
  LInfo link() const {
    return LInfo(min(light_min, path_min), max(light_max, path_max),
                 path_sum + light_sum, light_sz + path_sz);
  }

  // 遅延伝搬
  void propagate(const Lazy &p) {
    if (p.type == 0) {
      return;
    } else if (p.type == 1) {  // change
      v = p.v;
      path_min = p.v;
      path_max = p.v;
      path_sum = p.v * path_sz;
    } else {  // inc
      v += p.v;
      path_min += p.v;
      path_max += p.v;
      path_sum += p.v * path_sz;
    }
  }

  // light-edgeに対する遅延伝搬
  // pathとsubtreeの遅延伝搬が両方ある場合に実装する
  void propagate_light(const Lazy &p) {
    if (p.type == 0 or light_min == inf_max) {
      return;
    } else if (p.type == 1) {  // change
      light_min = p.v;
      light_max = p.v;
      light_sum = p.v * light_sz;
    } else {  // inc
      light_min += p.v;
      light_max += p.v;
      light_sum += p.v * light_sz;
    }
  }
};

using LCT = SuperLinkCutTree<Info, LInfo, Lazy>;

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